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Author Topic: How much nitrous?  (Read 3062 times)
cobrajet
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« on: January 16, 2011, 06:37:39 pm »

I am in the process of helping my freiend build his windsor.It is .040 over roller block with -22cc probe dished pistons, eagle I-beams and a stock crank. Heads are trick flow 206 twisted wedge race heads w/ a super victor efi intake.Compression will be about 8.8 to1 with these heads.He was originaly going to run an older vortec v-1 with 10 lbs. of boost but a since sold that unit.So I recommended Spray.Will this combo hold a 300 hp shot. I recommended a two stage set up, 150 shot per stage. I also metioned a 6500 rev limt maybe 7000 tpos but no more than that as that would be pushing it as it is. Any help is a plus.
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Blk88GT
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« Reply #1 on: January 21, 2011, 12:38:54 pm »

If we're talking a 302 based block, this is a bad idea.

If we're talking a 351 based block, it's better, but the crank isn't going to be happy.

JMHO.
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Ian
1988 Mustang GT - 8.97 @ 150.46 on 275s!
2006 GMC Sierra 2500HD LBZ with lots of goodies

Speedos irritate me
juiced coupe
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« Reply #2 on: January 21, 2011, 02:42:31 pm »

 What He Said  about the blocks and crank.

About the 300 shot. That is a hell of a hit. Proper tuning will be critical, especially with a 2 stage. Don't just expect to bolt on a $500 plate system and be done with it. Thinking like that is the main reason you hear so many horror stories about nitrous.

Since he is running a high pressure fuel system, I would use a separate low pressure system for the nitrous.

If he intends to go on with the idea of such a big hit (especially a 2 stage!), I would contact Steve Johnson or Monte Smith for a properly flowed and balanced nitrous system. It won't be cheap, but you get what you pay for (and then some). With their help, the learning curve will greatly shortened.
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Just a 12 second car with a 11 second engine.....that runs 10s
http://sbftech.com/index.php/topic,20009.0.html

Quote from: Monte Smith
Bottom line, if it was the hot ticket, the fast guys would do it.............they don't

You might need some Titanium rods and a flow bench!  LMAO on floor
Induction-Solutions
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« Reply #3 on: January 25, 2011, 08:29:04 am »

The lower compression helps the future of this set up.. Also the cam can play a big part in what he can get away with..

The best approach on this is to start small and work your way carefully into it.. Thanks, SJ
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cobrajet
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« Reply #4 on: January 29, 2011, 01:02:37 pm »

It's a 351 windsor. It does have a main support also, which I do believe helps to a degree. He is going to have Jay grind a cam for this set up! His main goal is to get in the 10's. The car weighed 2900 lbs with him in it.  Stick car. Can 10's be reached with a smaller hit? I thought A two stage set up would be better than stuffing it in all in one shot. Or is a single shot better? 
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juiced coupe
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« Reply #5 on: January 29, 2011, 07:03:06 pm »

If the car is right, that could possibly run 10s on motor alone. Should be a cake walk with a 100-150 shot.
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Just a 12 second car with a 11 second engine.....that runs 10s
http://sbftech.com/index.php/topic,20009.0.html

Quote from: Monte Smith
Bottom line, if it was the hot ticket, the fast guys would do it.............they don't

You might need some Titanium rods and a flow bench!  LMAO on floor
68mustang405
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« Reply #6 on: January 30, 2011, 05:25:16 pm »

If he hasn't put the motor together yet, why not try and raise compression by milling the heads or the deck of the block? 8.8:1 is low especially if those are aluminum heads!
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68 Mustang 310 twisted wedge 170, tfs1, weiand stealth, 1.6 rr t5 3.55s with a locker, a/c and all the creature comforts.

On a serious note.. wagon made 3000hp on the dyno
jaywatt
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« Reply #7 on: February 01, 2011, 01:47:57 pm »

What about a progressive n2o controller, would that help ease the hit???
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1995 mustang gt, all stock with aode. ( motor, tranny, rear end, and suspension will be done in 2011)
juiced coupe
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« Reply #8 on: February 01, 2011, 03:59:32 pm »

What about a progressive n2o controller, would that help ease the hit???

It would ease the hit to the tires. The heaviest load on the engine is in the higher gears (other than the initial hit).
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Just a 12 second car with a 11 second engine.....that runs 10s
http://sbftech.com/index.php/topic,20009.0.html

Quote from: Monte Smith
Bottom line, if it was the hot ticket, the fast guys would do it.............they don't

You might need some Titanium rods and a flow bench!  LMAO on floor
Blk88GT
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« Reply #9 on: February 03, 2011, 12:16:01 pm »

You certainly don't need a 300 hit to run 10s with a 351.
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Ian
1988 Mustang GT - 8.97 @ 150.46 on 275s!
2006 GMC Sierra 2500HD LBZ with lots of goodies

Speedos irritate me
Blackbetty88GT
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« Reply #10 on: February 03, 2011, 12:23:38 pm »

Thats what my moron cousin is attempting to do is use a stock 351 windsor roller and ump as much nitrous as he can to be as fast as he can. I know stupid idea
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cobrajet
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« Reply #11 on: February 04, 2011, 04:44:00 pm »

I think the block has been decked already. but  it is already assembled into a short block. Remember the pistons have a 22cc dish. The heads are trick flow 206 race heads so the are aluminum. I don't see how that will effect compresion. I know it acts like a heat sink but other than that not sure how it would. He wants to use small plate system. like 150 to 175 shot. If I can talk him in to a sportsman fogger would this be a better way to go? Agian intake is super victor efi.
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bigdaddy
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« Reply #12 on: February 04, 2011, 08:47:54 pm »

If 10's are the target, then I think a 100 shot will put the car there. With the low compression ratio, the 22cc dish will benefit you when you spray. Our motor has 22cc dish pistons and it performs out of proportion to the amount of spray because of the cylinder fill we get with the NO2. Start with the 100 hit and i think you will be really surprised. Can't wait to hear the results. Good Luck!
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438 Dart up & running.
Brian Feimster
cobrajet
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« Reply #13 on: February 08, 2011, 02:41:51 pm »

I used a deck clearance calculator
22 cc dished piston
1.772 compression height
3.5" stroke
9.5" deck
= .022 in the hole. is this correct?
 The heads he is using has a 61cc combudtion chamber. If I am correct his compretion will be less than 8.8 to 1. he does'nt want to mill the heads but he is willinto deck the block.  Pistons are probe part number is 12358.

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juiced coupe
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« Reply #14 on: February 08, 2011, 03:03:25 pm »

The only way to know the deck clearance is to measure it. Otherwise, you're just making assumptions.
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Just a 12 second car with a 11 second engine.....that runs 10s
http://sbftech.com/index.php/topic,20009.0.html

Quote from: Monte Smith
Bottom line, if it was the hot ticket, the fast guys would do it.............they don't

You might need some Titanium rods and a flow bench!  LMAO on floor
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