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Author Topic: TFS-R upper internal pics  (Read 30791 times)
David Claflin
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Location: Redneck Riviera (Ft Walton Beach Florida)

« Reply #30 on: December 21, 2015, 06:53:37 pm »

An interesting thing about this upper is that it has provisions for two through bolts, apparently the later ones went to only one, the one on the drivers side of the intake. I figured less is better, so I cut the first one out and will the holes welded shut.

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1990 Red LX, 306, 75MM, ported gt40's, Holley SMII, accufab longtubes, 3" exhaust, 4.10's, 318RWHP/316RWTQ
1985 LTD LX 302, ported TW's, XE-264 cam, ported Holley SMII, 75MM-R TB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
David Claflin
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« Reply #31 on: December 21, 2015, 06:56:45 pm »

These are the pieces I cut out, and the newer version of the intake that uses a short bolt under the throttle body.

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1990 Red LX, 306, 75MM, ported gt40's, Holley SMII, accufab longtubes, 3" exhaust, 4.10's, 318RWHP/316RWTQ
1985 LTD LX 302, ported TW's, XE-264 cam, ported Holley SMII, 75MM-R TB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
David Claflin
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Location: Redneck Riviera (Ft Walton Beach Florida)

« Reply #32 on: December 21, 2015, 07:02:08 pm »

Once I got the back cut off you can see the other through bolt column, they must have determined having the two in there was blocking air or not really needed.
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1990 Red LX, 306, 75MM, ported gt40's, Holley SMII, accufab longtubes, 3" exhaust, 4.10's, 318RWHP/316RWTQ
1985 LTD LX 302, ported TW's, XE-264 cam, ported Holley SMII, 75MM-R TB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
Mr.Blue
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« Reply #33 on: December 21, 2015, 10:10:32 pm »

ooooohhhhhh cccrraapppp................you done done it now.................
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Rodney Tolleson/VP SBFTech van club
David Claflin
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Location: Redneck Riviera (Ft Walton Beach Florida)

« Reply #34 on: December 24, 2015, 07:34:36 pm »

Added the dowel, think it would be best to open the floor at the entrance so they're all uniform. I at first thought it would be OK to just add the dowel and epoxy, hate to pass up what I think would be beneficial while it's open.
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1990 Red LX, 306, 75MM, ported gt40's, Holley SMII, accufab longtubes, 3" exhaust, 4.10's, 318RWHP/316RWTQ
1985 LTD LX 302, ported TW's, XE-264 cam, ported Holley SMII, 75MM-R TB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
David Claflin
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Big Block
****
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Posts: 7871


Location: Redneck Riviera (Ft Walton Beach Florida)

« Reply #35 on: December 24, 2015, 07:36:40 pm »

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1990 Red LX, 306, 75MM, ported gt40's, Holley SMII, accufab longtubes, 3" exhaust, 4.10's, 318RWHP/316RWTQ
1985 LTD LX 302, ported TW's, XE-264 cam, ported Holley SMII, 75MM-R TB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
David Claflin
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Posts: 7871


Location: Redneck Riviera (Ft Walton Beach Florida)

« Reply #36 on: May 13, 2016, 03:20:41 pm »

I finally had the intakes welded up. Now that they're back to being one piece it looks like the one with almost no runner length would have benefited from having some of the floor in the crossover removed. It just seems like the air would be pinched off right when it would need to start to turn. Rolling that ledge back a little I'd think would make room for the air to slow down and start to turn. Do you fellers think it's worthwhile, only costs me a little time and a case of beer for the welder.....


This is one that I just opened up and put a 1/2" dowel on the edge of the crossover to help the air turn better. I'll be doing a back to back to back on the dyno, and maybe the track of a bone stock upper, this one, and the other one I cut all to shit.  Naughty
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1990 Red LX, 306, 75MM, ported gt40's, Holley SMII, accufab longtubes, 3" exhaust, 4.10's, 318RWHP/316RWTQ
1985 LTD LX 302, ported TW's, XE-264 cam, ported Holley SMII, 75MM-R TB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
David Claflin
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Big Block
****
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Posts: 7871


Location: Redneck Riviera (Ft Walton Beach Florida)

« Reply #37 on: October 12, 2016, 10:40:37 pm »

Loaded the manifolds up in the car, the stock TFS-R was on the car, along with the slightly modified one, the really modified one, and box upper were all in the back.
Ran the stock TFS-R upper first, swapped the slightly modified one on, and ran it, there was virtually no change, the slightly modified one picked up 4 HP, both peaked at 6150 RPM. Then went with the upper with virtually no runner, and it lost 3HP and 6ft. lbs. Because it was so late we didn't try the box upper, but I figured it wouldn't make much difference as there was really not much difference between the 3 others. I left that last one on the car on the way home and it seems to want to run up quicker, doesn't feel sluggish at all. So might try to compare this and a stock one at the track sometime.
I think my little 306 doesn't turn enough RPM for it to really matter for these intakes. I'm going to be starting to swap the 331 into my son's 94 this weekend, so we'll be doing the same comparison with his car, that should get some better info from it. Then I hope to do it again with the 347 in my LTD.
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1990 Red LX, 306, 75MM, ported gt40's, Holley SMII, accufab longtubes, 3" exhaust, 4.10's, 318RWHP/316RWTQ
1985 LTD LX 302, ported TW's, XE-264 cam, ported Holley SMII, 75MM-R TB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
David Claflin
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Big Block
****
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Posts: 7871


Location: Redneck Riviera (Ft Walton Beach Florida)

« Reply #38 on: May 13, 2017, 09:56:59 am »

We finally got my son's 94GT with the 331 on the dyno, but had some issues with the processor pulling timing, and my binary editor program locking up so couldn't datalog on two of the runs. I'll re-accomplish this with the 347 in my LTD once I get that going.
What we learned though is the box made the most power by about 20 over the others, but without the datalog to see if timing was being pulled and comparing that to the power numbers its not really a valid test. The dyno operator, who I consider to be pretty savvy said the of the three long runner uppers ( an unmolested TFS-R, one with the 1/2" dowel at the end of the crossover and the openings all standardized, and the one I butchered up) the one that I butchered up would be the fastest at the track. The torque curve on that one was actually flattest of all which seems peculiar given the short runners.
We did these back to back to back to back with the box being the last one as that's what he normally drives with it.
Stay tuned for more info later with the 347.
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1990 Red LX, 306, 75MM, ported gt40's, Holley SMII, accufab longtubes, 3" exhaust, 4.10's, 318RWHP/316RWTQ
1985 LTD LX 302, ported TW's, XE-264 cam, ported Holley SMII, 75MM-R TB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
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