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Library Tech Library Tech => 289/302 - non-stroker combos => Topic started by: David Claflin on December 30, 2013, 09:27:30 pm



Title: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on December 30, 2013, 09:27:30 pm
01. Block: stock roller from my son's 94 cobra, has around 130K on it. Shortblock has new timing chain, high pressure pump, installed after I pressure washed it, inside and out. lifters came out of an explorer engine that was given to me, cam was under the workbench in the garage.
Displacement: 302
CR: stock is 9.2

02. Heads
Brand: ford
Model: gt-40 iron
Ported?: yes, owner ported
Has valve job courtesy of Coulter Racing heads, springs are just the outers from the 977 dual springs that were on my 306. I think they would be sold as comp 972's.

03. Camshaft (If the camshaft is custom, NOT providing this information is understandable, and NOT expected)
Brand: ford
Grind Number/Model: stock 5.0 HO cam
Int./Exh. Duration @.050": 211/206
Int./Exh. Lift: 470/470 with 1.7 Cobra rockers
Lobe Separation Angle: 114

04. Induction
Carbureted/EFI: EFI
Intake: Exploder, ported
Carb/Injector Size: 30llb
Throttle Body Size: 80MM-R
Downs Box upper

05. Tuner: that Claflin guy

06. Exhaust
Style: Accufab long tubes
Diameter: 1-3/4
Catted: N/A
"X" or "H": VRS 3"X
Mufflers: 3" ultraflo
3" flowsmasher tailpipes

07. Power Adder: for sissies  :nono :pimp

08. Transmission
Manual/Auto: man stick, soon to be broken I'm sure
Model: t5
Plate/Clutch: Spec Stage II
Converter Stall:

09. Gears
Style: UNK
Ratio: 4.10
Differential Style: 8.8 31 SPLINE, I think it has a torsen diff, not a regular traction loc, it was in the car when I bought it.

10. Rear Suspension Setup: Team Z lowers, UMI uppers, solid upper bushings, Strange shocks, H+R supersport springs, mustang GT disc brakes

11. Front Suspension Setup: Team Z tubular K, control arms, strange 10 ways, 12/150 coilovers, Maximum motorsports caster/camber plates, mustang gt discs

12. Tires: 26x10 good year slicks, 165/80 radials front on weld drag stars

13. Car Weight: 2800-2900 race weight........I hope, the lighter the better

Other: Flaming river manual rack, no sway bars, no heat or A/C, no tab/tad solenoids, no cruise control. It still has door bars, and bumpers front and rear, and a radio, but only rear speakers  :D. Carpet underlayment taken off and tarpaper pulled off the floor.

Time Slip: None yet, hopefully putting this up here will help me get it done by the end of this month. Hoping for mid-low 7's in the low 90's for MPH.
60ft:
300ft:
1/8th ET:
1/8th MPH:
1/4 ET:
1/4 MPH:

Dyno Data:
FWHP:
FWTQ:
RWHP:
RWTQ:


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: juiced coupe on December 30, 2013, 10:19:55 pm

07. Power Adder:  I'm too old and can't shift that fast.  :ouch:

Fixed it for ya.  >:(

Where did the wheelchair smiley go?


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: jayh on December 30, 2013, 11:02:16 pm
these are usually the FUNest builds


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: quickshift on December 31, 2013, 01:15:04 pm
Lookin good so far! :clap


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: mighty mouse on December 31, 2013, 03:08:14 pm

07. Power Adder:  I'm too old and can't shift that fast.  :ouch:

Fixed it for ya.
:clap


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on December 31, 2013, 05:05:10 pm

07. Power Adder:  I'm too old and can't shift that fast.  :ouch:

Fixed it for ya.  >:(

Where did the wheelchair smiley go?
LOL!! Thought that might get you riled up.... :orglaugh

Had to laugh a minute ago looking at the build thread for this and how I thought I might have it going by the fall. How's the go, the best laid plans or some such nonsense... :drink


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: 289nate on December 31, 2013, 05:22:08 pm
Throttle body is WAAAAAY to big!!!  It won't even idle with that big of a throttle body because there will be no velocity.  :orglaugh

A mid to low 7 would be outstanding with that set up.  You must be taking lessons from Rodney.



Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on December 31, 2013, 06:31:13 pm
Throttle body is WAAAAAY to big!!!  It won't even idle with that big of a throttle body because there will be no velocity.  :orglaugh

A mid to low 7 would be outstanding with that set up.  You must be taking lessons from Rodney.

We've been helping each other out with stuff, bouncing ideas off of each other about things, talking each other off the ledge when it comes to some things. :orglaugh
I'm going to see what this motor will do. It'll only have a 4.10 initially, will probably just run the T5 and use the 4,30 gear, vs. getting an A5 and using the 4.56. The other glorified explorer motor that will go in after this one has more power potential so should run faster.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on January 01, 2014, 12:49:31 pm
If I can get it down to 2900 with me in it, then with this first engine it should run a 7.4@92, we'll see how this works out. :drink


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: Mr.Blue on January 02, 2014, 09:34:25 am
If I can get it down to 2900 with me in it, then with this first engine it should run a 7.4@92, we'll see how this works out. :drink

It'll run those numbers  if the track is decent.................probably 7.30's in good air...........7.40's missing 4th :P............be nice seeing another stick car banging away :clap


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: jayh on January 02, 2014, 09:51:42 am
this thing would respond I think with some lift and some overlap but keep the duration short on the intake

#5 on the lower can always benefit from more work!


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on January 02, 2014, 07:56:39 pm
this thing would respond I think with some lift and some overlap but keep the duration short on the intake

#5 on the lower can always benefit from more work!
THe intake has been ported, pretty well I think. There's quite a few things that could be done better, the point of this was to see what could be done with stock stuff that I had laying around taking up space.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on November 15, 2014, 06:39:32 pm
Put this on the dynocom today too. I forgot to get the printout for this, but it made 316 RWHP@5700 RPM, and 318 RWTQ @ dammit I forgot.... :orglaugh. I was kind of surprised, torque curve was pretty flat, it was about 50 ft. pounds lower than the cobra, but I thought it did decent for a box upper, and ported cobra heads.
I'll have to see if he saved anything from today and get it to post.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on November 21, 2014, 09:02:20 am
Forgot I took a video of this turd, so posted it on youtube. and corral :pimp
https://www.youtube.com/watch?v=vRGGkohBRT0&list=UUDiBIRkLaI3jBXHygW1rAAw


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on November 10, 2015, 08:45:34 pm
Just to throw an update on this. I still haven't had it to the track and made a clean pass, but I think I've got the clutch issues sorted out. I had the engine out to swap the heads to another set of GT40s I had ported, and milled .020. I sold the explorer lower, and box upper I had on here, I needed another intake and the only one I had was a TFS-R with a box upper, so threw that on. Only changes aside from those mentioned are a set of beehive springs, 4.30 gears, and a spool. It pulls hard to 6000, so hope to bring it up to Johnnys to throw it on the dyno. I plan to run it with full exhaust, pull mufflers and tailpipes, and put bullets after the x, and then finally with bullets off the headers, should be a good comparison I think.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: 289nate on November 12, 2015, 11:05:11 pm
Cool


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on December 09, 2015, 07:26:41 pm
Just realized I made this thread almost 2 years ago and have yet to make a clean pass with this turd... :bang
I think I got all of the issues corrected, hopefully the weather will cooperate so I can go up there this Sunday.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: thunderjet302 on December 09, 2015, 08:19:47 pm
Isn't the TFS box intake going to make it slower than the GT40? After all it has just a stock HO cam........... ;)


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: Mr.Blue on December 10, 2015, 09:12:45 am
Isn't the TFS box intake going to make it slower than the GT40? After all it has just a stock HO cam........... ;)

Naw, tfs box is the least of that cars problems....i'm sure the driver can slow it down just fine :drink









J/K! :laugh


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: thunderjet302 on December 10, 2015, 01:15:04 pm
Isn't the TFS box intake going to make it slower than the GT40? After all it has just a stock HO cam........... ;)

Naw, tfs box is the least of that cars problems....i'm sure the driver can slow it down just fine :drink









J/K! :laugh

His car has the same problem my car does: the driver  ;D


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on December 14, 2015, 06:53:35 pm
Isn't the TFS box intake going to make it slower than the GT40? After all it has just a stock HO cam........... ;)
It makes more power with the box than the Gt40. I did make it up to the track with it finally, and did make some clean passes, finally. Learned a few things, figured out I need to change a couple parts. First among them is I need to swap the cobra flywheel which weighs 13 pounds for the ford motorsport billet one I've got. The cobra one is just too light for the power level of the car, at the launch the front end comes up, it deadhooks and then as it's coming down it starts to go forward. I thought on the way home I should have gone up on the rear tire pressure to maybe get a little wheelspin, but I think the flywheel would be helpful to get it rolling.
I started out launch RPM at 3500, and worked up to 5500, and probably should have gone higher too.
60 ft: 1.611
1/8 ET: 7.75
1/8MPH: 87.50

Weather was 1300 feet above sea level, 75 degrees, 65% humidity, typical Florida "winter" day  :pimp
Next Sunday is supposed to be a little cooler, so am going to try to get that flywheel swapped this weekend. I'll make a few runs with it as is, then if Rod remembers to bring the TFS-R upper we'll swap that on and make a few more.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: Outlaw Bill on December 14, 2015, 07:51:59 pm
I don't think the flywheel is the issue., leave it be.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on December 14, 2015, 07:55:29 pm
I don't think the flywheel is the issue., leave it be.
I know the stock HO cam isn't really good to use with the TFS-R box, but it's what I had, I wasn't going to buy a systemmaxII, or spend more money for another cam. I figured as it was stuff I had here I could use them to make some passes and learn about suspension tuning.

I kept upping the launch RPM, and tightening the front shocks, but didn't really get rid of the bog off the line.
https://youtu.be/7Bx5v_-Yaks


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: Outlaw Bill on December 14, 2015, 08:03:16 pm
More tire pressure, plus might need to revisit timing and fuel.

Shit point?.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on December 14, 2015, 08:11:16 pm
More tire pressure, plus might need to revisit timing and fuel.

Shit point?.
I've got spark at 37 total. I'd have to look but I think fuel was in low 12's. I started out shifting at 5500, and was working my way up, fastest pass was shifting at 5800, ain't skeered to go higher. Would like to get it on dyno to see where it peaks as I'm not consistent enough yet to be able to tell difference from one run to the next.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: Outlaw Bill on December 14, 2015, 08:12:41 pm
Keep shifting higher. GT-40 heads/intake with stock camshaft peaks at 5400 rpms usually, give or take 100 rpms. So about 5700-5800 rpm shift point is usually what works best. That TFS box should want more.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on December 14, 2015, 08:48:45 pm
That's the plan to run it higher, I've got 1.7 rockers on it, and beehive springs, so it'll go higher without any issues.
I should have put more pressure in the rears last night, might just try it again the way it is, and start out at 20 PSI in the rears.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: Outlaw Bill on December 14, 2015, 08:55:13 pm
I'm guessing its needs more gear also.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on December 14, 2015, 09:32:07 pm
Has 4.30s in it, with a stock T5, 4.56s would be nice, but would need a 2.95 first trans, that's not in the cards.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: thunderjet302 on December 14, 2015, 09:35:45 pm
Isn't the TFS box intake going to make it slower than the GT40? After all it has just a stock HO cam........... ;)
It makes more power with the box than the Gt40. I did make it up to the track with it finally, and did make some clean passes, finally. Learned a few things, figured out I need to change a couple parts. First among them is I need to swap the cobra flywheel which weighs 13 pounds for the ford motorsport billet one I've got. The cobra one is just too light for the power level of the car, at the launch the front end comes up, it deadhooks and then as it's coming down it starts to go forward. I thought on the way home I should have gone up on the rear tire pressure to maybe get a little wheelspin, but I think the flywheel would be helpful to get it rolling.
I started out launch RPM at 3500, and worked up to 5500, and probably should have gone higher too.
60 ft: 1.611
1/8 ET: 7.75
1/8MPH: 87.50

Weather was 1300 feet above sea level, 75 degrees, 65% humidity, typical Florida "winter" day  :pimp
Next Sunday is supposed to be a little cooler, so am going to try to get that flywheel swapped this weekend. I'll make a few runs with it as is, then if Rod remembers to bring the TFS-R upper we'll swap that on and make a few more.

I figured that would be the case. I'm just repeating what the "experts" on Corral say ;).

Have you tried shifting at 6000rpm? There might be some more in it shifting higher.


Title: Re: 90 LX with a cobra motor and silicate hoses
Post by: David Claflin on December 14, 2015, 10:00:43 pm
Have you tried shifting at 6000rpm? There might be some more in it shifting higher.
Not yet, was working toward that yesterday, was bumping up launch RPM and shift points.