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constructive advice on genv build

foursixer

foursixer

New member
hi, i own a stock 98 gtp. i am doing a total overhaul on the car suspension, brakes, interior, engine and appearance update. now my question. i am going genv blower. the blower consist of minor porting and full polish work. LIM like wise including full port and match. northstar TB setup, MAF and so fort. 42.5 injector and bigger fuel rails. i am using 1.9 harland roller rockers and intense push rods. with the stock timing chain and cam, should i use #105 or #130 springs to prevent valve float. my intent is a full dynoed custom tune, so i am going for the max my combination would allow on pump gas. ANY ADVICE WOULD BE APPRECIATED!
 


dont gasket match the LIM if youre not going to gasket match the heads too otherwise there will be a step there and you dont want that.

105# springs should do you fine, youre not revving high enough to justify 130# springs.

i suspect that this setup fully tuned and dialed in will run a 3.2 pulley on decent timing.
 
makes since, on the LIM! also intercooled and headers. i am trying to get 350whp out the motor. is this possible without touching the long block?

Bio248 said:
dont gasket match the LIM if youre not going to gasket match the heads too otherwise there will be a step there and you dont want that.

105# springs should do you fine, youre not revving high enough to justify 130# springs.

i suspect that this setup fully tuned and dialed in will run a 3.2 pulley on decent timing.
Click to expand...
 
Just cam it and don't look back...you'll thank us after you have to sell your rockers to make more power
 


ive seen heads/cam/intercooler builds only hit 330whp. the highest m90 on pump gas is still only at like 410whp. if you want a mild build, stick with the m90. if you want big power, go straight for a turbo.
 
i appreciate the input by everyone. i think am going for the mild build to keep the car somewhat more reliable. i dont intend on doing the transmission this year. with that in mind i may have a thicking time going turbo over 350 whp knowing am going to get on it. used parts stem a better resale value. all gp members who have stuff sale pm me! i hate to say but it is better to learn from others! please help me with the do's and dont's going genv i/c. a stupid statement might just be my answer. thank you!
 
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