We have had nothing but problems with our 440ci LSX street car but we think we have all the problems behind us now. The short story is the first set of heads had seat issues (the valve seats where shrinking) so we threw on a set of 98 ls1 heads so we could drive the car but had issue' pushing the right head so we pulled the heads to the machine shop to be decked and threw a new set of cometic head gaskets and some yamabond and on the first night out it lifted the right head again, so we pulled the engine and toor it down, We had the block redecked along with the heads.
Last night we took it back out and everything went very smooth well atleast with the engine anyways. Here are some details on the setup and runs.

440ci LSX
ported 98 ls1 heads nothing special
small solid roller
vic jr with a 100mm tb and elbo
17/8 kooks Y-pipe stock fbody muffler with a cutout
TH350 no transbrake 5200 FTI converter
NOS direct port with a mini controller jetted at 400
stand alone low pressure fuel system with 116 fuel

we put the car on the scales today with a half tank of gas race ready it was 3880, we also run 325/50 MT

First two runs we had a .2 delay and started it of at 20% ramping it to 40% over 1.8 sec but it blew the tires off at about 40ft so out of fustration i set it up with a .2 delay started it off at 10% and ramp it to 40% over 3.0 sec but i also took the air pressure from 18psi to 15 and it hooked

1.533 60ft
6.28@119mph

next run i set it at no delay and started at 20% ramping it to 40% over 1.8 sec and it ran

1.503 60ft
6.18@119

next run set it at no delay started at 30% ramping it to 40% over 1.5 sec

1.450
6.094@119

Called it night and drove the car 70 miles to hang out with some friends and the greatest part of all thisis it didnt push a single drop of water.

The next day (today) we drove it 100 miles to the track BMP to possibly get a 1/4 mile hit but we ended up using all the nitrous with 1/8 mile hits lol but we did run 4 6.0 passes at 116-118mph.

we have alot left in this setup the way it is. The afr is in the mid 10's and timming at 12.5* on a #9 plug Once i get the afr up we will turn up the wick and see where it gets us.

 

Nice times, ik how frustrating these promblems can be.

So which heads are you running now?

 

98 ls1 heads 806 casting

 

here is a vid from today 1/8 mile 6.04@118

http://s46.photobucket.com/albums/f1...urrent=604.flv

 

This vid she shifted from 1st to 3rd and it went 6.15@114 she shut it down before the 1000ft and it went 9.63@128

http://s46.photobucket.com/albums/f1...urrent=963.flv

 

Sure is fun killing gutted dragcars with street cars. Nice runs.

 

Great times with those heads.

are you planning to get another heads?? I think with those CI the car still have lots more in from those heads.

 

Yes we are going to put something else on it just not sure what heads at this point. The heads that are on it now flowed 310@600 so i would think and ton of power is being left on the table with these heads lol

 

yes it is. Its one of the best feelings I would have to say. I couldn't help but have a big smile on my face all day, if evil looks could kill i'd be dead.

 

very quick car, get you some better heads and get that 60 down and you got a monster.

 

Shoulda gone turbo