hello fellas, i was wondering if anyone can help me with this... i bought this car and am curious of how much nitrous i can spray on it. the seller told me this car made 421 rwhp N/A. it has really raised some concerns because this car has not been tuned. this car is running Extremely rich, is it possible to pull those numbers with out being tuned? this is the list of mods the engine has per the seller...

Drivetrain:
CPT Pro Race 4L65E, 0 miles on it since refreshing
Fuddle 3800 converter
Stock 10 bolt w/3.73 gears

Exhaust:
Hooker LT's, A.I.R Welded closed.....no emissions
Custom Y-pipe
3 inch cutout
B&B Tri-flow cat-back

Engine:
Jackson Motorsport Forged 347 shortblock
Diamond Forged 10.5-1 pistons
Eagle Rods
Comp Cam 234 236 on a 112 LSA
5.3 liter fully ported and polished heads
Comp 918 Beehive springs
Comp Hardened stock length push rods
Yella Terra 1.7 Rockers
LS6 Intake
Ported and Polished stock TB
Smooth Bellow
K&N FIPK

this was posted by the seller....
Power Adder:
I have a 100% complete fully functional NOS direct port kit that is plumbed into the LS6 intake. I have jets from 175-400. The jets that are currently in it are the 250. It has a complete stand alone fuel system so you don't have to worry about starving the motor when you spray. External fuel pump, holly fuel pressure regulator, purge, MSD window switch, and a Jimmy Jams WOT switch and ashtray switch panel. Everything is wired up and works perfectly. Last season I had a blower on the car and it went a best of 9.7 @ 146. And that was with just about everything listed minus the 10 bolt. I did have a Ford 9 inch w/4.11 gears. I have since pulled the blower off and put in a new forged 347 block and built if for NOS. The car will easily go 10's as it sits and should go 9's with some weight reduction and maybe some more juice. But this is a for sure 10 second car now. I have slips from last year and 2 vid's of the car going 10.0 and a 9.98. I am getting the dyno tuned for the MOTOR only. The buyer can get it tuned for the NOS as I do not want to get it all set up for the 250 shot if the buyer doesn't want to run that shot. So I will leave that up to the buyer. There is absolutely nothing wrong with this car at all. It sounds very aggressive with the cam and performs just the same.

 

anyone that can help me???

 

so you got a 10 bolt still in it ?

 

well get the bitch tuned if you want to spray it with however much NAWWZZ you want to throw at it, better to be safe than sorry, if its tuned for n/a it will be a much more aggressive tune than what you would want for spray.

he said it was tuned, so the numbers are realistic. did he give you a dyno sheet from when he got it tuned?

 

just get it on a dyno and check the a/f ratio

 

no he didnt give me anything, the car still has a stock 10 bolt with 373 gears, i just got back from the track and ran a disgusting 13.56 on the1/4 without spraying. the car sounds really aggressive but it just didnt feel it pulling on 2nd and 3rd. the car has not been tuned as of yet. the seller told me that it had pulled 421 rwhp i think that is bull. do you think getting the car tuned will make a whole lot of difference?

 

also one of the spark plugs on piston#5 was not burned properly, it actually looked wet. what can the problem be? those numbers on the track dont make sence, do they?

 

You need a tune for sure .

Your probley running real rich which will kill the top end performance .

My new motor put down 473/477 untuned and felt week on the top end and ran out at 11.6@120 .

I got the bitch tuned and it went 11.02@126 .

Big differance .

 

see thats what im talking about you ran still an 11 shouldnt i have gotten better performance out of the car if in fact it did pull 421 to the wheels? not a mid 13?

 

You will never know untill you put it on a dyno and let a good tuner handle it .

If the power is there , he will find it .

 

i really appreciate the help everybody. thanks for taking the time. i am scheduling the car to get tuned sometime this week at henderson performance in New Braunfels, TX. hopefully Corey (tuner ) will give me some good results. thanks again guys.

Ben