Think I should move this over to the engine tech forum. Can one of the mods do that for me?

 

Every motor has blow by to some degree. I know of no significant differences between the LS head and the B20 head. Supercharged engines respond imediately and generally are more reliable because the boost levels are determined by a pulley so you can't get crazy with the boost like you can with a turbo. If real power is your ultimate goal then turbo charging is the answer hands down. But personally I have always wanted to tweak a supercharged car to the limit to see what it can do. Luckily I will get that chance with my cousins RSX since he will be getting the JRSC for his car as soon as it's available. We will install it, and start with the 75 shot of NOS he already has and go from there. His block has been fortified for turbo duty so it should hold up to the nitrous we are going to throw at it. he is more into the show scene than he is racing but he wants to at least be able to beat up on some WS6's and the suprcharger should take care of that and then some. We're gonna shoot for low 13's. Oh, and the displacement factor is a moot point. worry about that later, you can always stroke it. Besides, I know plenty of people making tons of HP without the extra displacement.

 

Oh, and what tuning problems is your friend having? I know a ton of people running boosted LS motors with hardly any limits other than their wallets.

 

I read.. I'll have to find it. But with a vtec head it's a ridiculous amount of blow by when turboing it. And yes I am looking to get low 12's with this car. But of course I'm going to shoot for 11's. Anyway, my plan was to use nitrous as well. I'll have to find out if there is a reason I was told to use the LS head over the B20 head. That was the least of my questions. But I'd be happy if someone could answer it Good luck with your project! And I appreciate the info.

 

The head has nothing to do with blow by. 11's? Dream on with that set-up. So have you thought about your valvetrain, cams, rods, pistons, etc?

 

ya I'm jsut trying to get the main components down before I get in detail with that stuff. What would you recoment to get wher I wanna be?

 

ive always been taught that close gear ratios improve 1/4 mile times. the quicker you can bang thru the gears, the quicker you get to the other end. if you want a vehicle with the highest top speed in an unlimited amount of space you would stretch the gears out.

 

The less time you spend shifting the better, because when you shift you're using time. Also 4 chances of miss shifting are better than 5 chances.


PLus, whats this talk of supercharging? Supercharging hondas in my opinion is a waste of money. Your not going to see gains as big with a turbocharger. With a jrsc on a ls you are lucky to see 200whp.

 

ive been raised around draggers all my life, and they have always told me you want short ratio gears.they always said the faster you can get thru your powerband, the faster your car will go. im still being told that to this day. my boss and i were actually talking about this the other day when i walked him over to a tech who owns a 9 second car, and another tech with a 12 second daily driver, and they both said the closer the gears, the quicker it is in the trap. one of the techs had been racing for 25 years, the other for about 15. and if i remember correctly, when i dragged a professional drag car i banged thru every gear in the tranny. but i do understand about the more you shift, the higher your chance is to miss a gear. but drag cars have always been built for people who could properly bang thru the gears. i dont know how to say this without sounding condescending, but, drag teams dont stretch out gears because their driver might miss a gear.

look at top fuel cars-they have 2 gears in the box, but the faster their drive tires get spun, the closer their gear ratio becomes because the tires expand.

 

For a newbie to racing I think the less shifting the better. besides most 9 second and below cars are autos anyway.