my car has a th400 in and 3600 stall, it has the 90mm plate kit from nos jetted at 150. on the dyno i only gained 80 hp and 43 ft not very happy with that. looking to see what other people are getting with th400 and spray thanks for the help

 

Rule thumb is that a TH400 will eat around 40hp to the rear wheels,My car on a 150 shot rated at the wheels gained 110 to the tire.Also stalled Auto's Dyno wierd because of the converter and what not
BTLFEDSS

 

What was your AFR? What was your timing at?

-Chris

 

Something's definately not right. I have got a TH400 with a 4k stall ATI converter and a 12 bolt with 4.11's. On motor, my car put down 355rwhp (It had put down 400rwhp with the old T-56). On a 150 shot it put down 511rwhp through the TH400, and I had lots of room to lean it out more but still have stock guts and a stock bottom end, so I don't want to puck my luck. My point is, I put an extra 156 rwhp down on a 150 shot through a TH400, and I could make more on the 150 shot, but choose not to. I have an 85mm plate from Nitro Daves, as well as his stand alone fuel system and some other goodies. I run 110 octane in the stand alone, and 93 in the tank. You need to check your AFR and your timing. Is someone tuning it for you? Or was it just a dyno run?

 

jermey formoto tuned the car this past weekend iam not sure were he had the timing , i no he said he retarded it 2 degrees for the bottle

 

I have a 408ci / TH400 with 4K TCT stall w 3.73s and all the other goodies. Simple dual nozzel system

N/A dyno last year was 479rwhp/534tq
With a 200shot I only gained 130 or so it said


I think I was blowin through the converter on the dyno cause it def feels like a 200shot at the track

Few ideas to toss out...random ideas
1. keep in mind that th400/stall eats up more than you think
2. what tires where you dynoing with (size matters)
3. A/F
4. Enough fuel
5. Compression
6. Full bottle/purged/heated properly
7. what cam are you running, might need to change it up
8. What RPM does it activate/deactivate; spraying though shifts i assume
9. Screw it and put some bigger pills in
10. What motor are ya runnin, tune?
11. Toss some TR8's in there
12. I wish it wasn't snowing
but with a 150 blast and a TH400, those numbers seem about right

Let us know boss

 

Seemspretty bad output to me. I see 200 to the wheels on 250 hits with most stuff Ive done with TH400s.

Can be lots of things, tune, camshaft, exh system, exh port, converter, trans etc etc. A decently working engine that size on 150 hit Id expect around 600 rwhp, maybe a little less

 

i keep seeing both people say about right and other say its off, think a th350 and a little different converter would help??

 

You're not getting power out of a kit so you think changing trans and converter will help?

NO. Make it work. The fact that your 150 hit is making 43lb-ft at the tire means there is something big time wrong. You should pull 5-6 degrees, not 2. It would have been a long day of tuning if that was my car. A quicker burning flame wants less lead to make max power. Check your jets and solenoids again. I really hope your trans/converter aren't damaged. Check the fluid level? Is that a Yank SS3600? If so that shouldn't be an issue.

 

Its off, period

 

Mike I will be running a tcs 4500 vert with my th400. The vert came with the car, so I'm going to see what it will do. The tranny is a brand new coan rmvb with a brake. I bought it for my camaro and then came across this stang, so it's going in there for a few tears and then I'll switch to a glide. I think the 400 will be better for street cruising though.

Next year I am putting a edelbrock plate kit on it, I got it used off this site cheap. I will be spraying 150 to 200 through it. But I'm running all motor the first year to get everything down pat on the car first.

 

a th 400/stall robs alot of power but there is no way it should only pick up 6x rw on 150 pills. if it is not a nitrous vert and blowing through it that will skew the numbers but who knows, big stalled autos almost always dissapoint on the dyno.

 

What size is your cam, if you have a lot of valve overlap youll get the same result.

 

251-259 on a 112 dont rember the lift off hand

 

thats your problem a 112 is a tight LSA with that amount of overlap. Is this a purpose built nitrous motor? normally you would use that cam if you were trying to lower cylinder pressure

 

What are you talking about! overlap itself wont cause lack of gains in power you should see. Have ran 20 more degrees overlap than this in nitrous motors.

LSA aint a magic number, and your motor has no idea what lsa your cam is. Have seen 250 rwhp on a "225' shot on a 112 lsa camshaft.

the cam may or may not be right, but its not the lsa's "fault"

 

LSA doesnt matter? its a direct correlation to valve overlap! also a 112 on a 230 ish cam is going to have more overlap than a 230 ish on a 114. So basically your saying overlap has nothing to do with it huh?

Everyone has an opinion your running too much overlap for that size shot.

 

Everyone does have an opinion. The cam I did for the car that won last years pump gas drags has more overlap than that. 9.0s at 3600 lbs on double the nitrous, Take it for what its worth.

 

Are you french or do you just have a mouse in your pocket?

 

I changed it to "I did" if it makes you sleep better at night. I dont like saying I or me all that much, others reeaallly enjoy it though!