Ok ima youngin(15) and me and my cousin have been working on a cobra for quite some time and we wanted to put a 2.2L kenne bell but stepped up to a 3.4L whipple charger...J/W does anyone know how much boostu can run through the stock block with some mods(fuel injectors etc) before major mods come into play??? thx for the help

 

it really depends everyone has different opinions. you should be able to go up to the 20-22 lb range fairly safely as long as you have some supporting mods. cooling and fuel wise. alot of people will say otherwise though.

 

boost psi - couldn't tell you honestly.. I know the block can typically survive up to around 750-800rwhp before you really have to worry...

but, the most important things are tune and cooling with these cars.... Just make sure you do it right.... honestly, I wouldn't put a 3.4 whipple on unless you're trying to run 25+ psi... the 3.4 whipple is only better then the 2.6/2.8 KB once you go over 30psi they say...

 

i know we definetly have enough cooling on it idk about fuel though

 

hes looking at 32psi with like 125 lbs injectors and alot of cooling mods...plus a built up block coming soon

 

When you say you have alot of cooling mods, what cooling mods do you have done? Also I hope your not gonna run all that psi without a dyno tune.

 

sorrry but you are not going to get anywhere near that without tearing into the motor. that high of boost will lift the heads right off the block with stock head studs. i just got the set of ARP studs for mine and they run just a hair under 1000 bucks. you are going to need new head gaskets and probably different pistons and rings. as they are the weak link of this motor. you are going to need to have a hell of a fuel system. probably something similar to what i have. Injectors that large require a driver box and run about about 800-1000 bucks depending on what you go with. you will likely need to go a to a return style fuel system and sump the tank. personally i run a sumped tank with an eliminator pump and the aeromotive eliminator system with 96# acceleron injectors and driver box. it is not cheap.

The kind of build you are talking about will be in the 850+ hp range and will not be nearly as easy as what you think. the stock Irs will not hold up to that so be prepared to swap in a solid or build the crap out of the IRS.

 

You know blown - this is why I like you... you actually have a grip on reality.. before and after the car build.... lol

 

Thanks, to the OP another piece of information to keep in mind. make sure you have a really good cobra tuner in your area or find one that you can bring the car to. Most people tune on either diablo or SCT software which uses the cars stock computer to make the adjustments. The stock computer can only compensate 20% in either direction of the stock parameters so anytime you get too far out of this range, which you will with anything bigger that about 60-72 lb injectors, there are alot of values within the program that need to be changed. it becomes alo more than jsut adjusting a little timing and watchin the A/f ratio. It became a process of more or less tircking every parameter across the board that it was within that 20% range. Kinda a pain in the butt really. Mine may have been trickier being that it was a turbo build not sure since i never went that far on the blower. the other option would be a standalone system but from what i have heard there are not too many exceptional stnad alones for these cars on the market. If someone knows otherwise please let me know. I may need one one of these days if i ever upgrade.

 

thats waht i meant by built up block he wants to rip it out and bring it to a machine shope have em bore and stroke it port polish it after market everything so pretty much nothing stock thats out goal..were dumb but not car retarded lol