Hey guys I still need to do some little work like fix the t rex fuel pump cause it is leaking at the fitting because Vortech doesnt know how to seal a fuel pump
anyway I drove the car and to do some tweaking and finally got it to make boost. When I nailed it in 2nd it roasted the tires and the boost gauge only said 8-9 pounds of boost. Why is that? The kit out of the box is suppose to make 8-10. But I also have the UPR power pipe to add another 2 psi. I was told because my engine breathes so well (ie heads, intake, exhaust) that it is harder to get psi higher, but I dont know anyway here are some pics of the install.
i wouldnt really count on the power pipe adding a while lot of boost. some people it adds some, somt it doesnt. i only noticed a 1 psi gain on the top end. and i wouldnt really worry about what boost its making its its boosting 8-9 psi thats great!. you cant really go by the numbers
whats going to determine boost levels is how good your engine is breathing to start with. compare a bone stock engine to a built HCI engine. take the same blower with the same blower speed say a stock s trim. on the stock engine it will make more boost, and will pick up alot of power. it could make say 10 psi
take the HCI engine it will make boost but maybe not as much, it could make only 8-9 psi. this isnt bad at all. it means the engine is pulling more CFM on its own and the blower wont be able to cause such a big pressure build up since the engine is more effiecient and it moving more air. the engine will pick up lots of power and wont be getting as high of intake air temps. rememeber that pressurizing air causes heat. IMO the biggest changes you will see are when you change the CID of the engine, just changing heads with just bigger ports, while yes it does increase the size of the intake tract i dont think it makes maybe a few psi difference. when you increase the volume in the cylinder that makes a huge boost difference assuming your running the same blower you did before. so stroking your engine to 347 from 302 will decrease boost levels
in theory putting 14.7(atmospheric pressure) psi of boost on an engine will be twice the airflow the given engine pulls in under normally aspirated. but to do heat losses since the air heats up under pressure it could take 15-17 psi to truly see the 100% power gain with no intercooling. but IMO running anything past 12 psi, and intercooler or some method of air charge cooling ( IC or water/meth injection) will greatly benefit the engine. you can throw massive amounts of boost at and engine but the air will heat up once you start running alot of pressure. you get to a point where there are diminshing returns and then to the point where the heat starts cancelling out the effect of the boost.
and also remember 14.7 psi on a honda engine and 14.7 psi on a SBF and 14.7 on a big block chevy are all going to be very different CFM ratings.
take the s trim that you have throw it on a honda 1.6 l and it will make alot more boost than what it makes on your car.
take it and throw it on a 454 it will make less boost.
ultimately your goal is to run as much boost as possible while keeping the incoming air charge as cool as possible all while keeping within the mechanical limits of the engine. if it were easy we would all be running 50psi + like top fuel car lol but thats not the case.
