i cant decide what to get/build how does a prelude turbo compare to an ls turbo. how does vtec react to turbo's even with higher compression r they better for that sense a Pvtec-turbo/Gs-r turbo. i just want imput what do u think?

 

LS turbo just b/c if your gonna keep the teg chassis its gonna be alot lighter then a lude chassis...and theres more **** out for the b-series motors then the h series...

 

i know they all say the ls block is better for turbo cuz of the compression, but i have seen some really sick gsr turbo dyno numbers on this board and therefore i would say go gsr turbo......

 

I totally agree. Tho ls has lower compression and is safer under boost than a gsr, like it always says if your base horsepower is low don't expect to get much out of a turbo then. This means basicly your gsr has more horsepower than the ls then obviously under same boost will output more than the ls even tho ls could prolly handle it safer.

 

the only reason an ls would be better for boost than a gsr would be because of the gsr's higher compression. if you lower the compression of the gsr to handle more boost (>9 psi) it will kill an ls because the gsr has better gearing for boost and vtec

 

NON VTEC all the way!!! LS is the way to go.. Turbo is boost, VTEC is not.. it wouldn't hurt to have it though.. But if you want a nice turbo set-up, an LS would be a good way to start..

 

Why don't you post your question twice in this forum and a few times in Tech, and then a few more places?

 

The GS-R only weighs 24lbs more than an LS, so the LS really doesn't have an advantage there....they're both a lot lighter than the lude. But a Prelude has 20-30 more hp than a GS-R and 50-60 more than an LS to make up for its extra weight.

 

This is a strict matter of opinion. Here's what I think.

1.) H22A Turbo. Yeah, tight, 2.2L tell me how tight it is after you have to go through all the effort of putting it in the Integra. Very high power potential, but not as understood as the B-Series, and much more difficult to maintain.

2.) B18A/B Turbo. Excellent starting platform, and a good bottom end w/ 9.0:1/9.2:1 compression ratio is execellent. Unfortunatly, if you're going to get more serious with making power, you'll want to swap the rods and pistons out for forged pistons and stronger rods. But the largest advantage is the ability to boost ~10psi on stock internals. Then you have to start worrying about ring lands. Blocks are cheap when you blow them up too.

3.) B18C Turbo. There's a reason that most of the unibody drag cars use the B18C for drag racing. Becuase theres a lot of parts availibility, the engines are simple to work on, aftermarket axles are much simpler to use and cheaper. Most importantly, it's the easiest way to make the most power. A non-VTEC set-up with the exact same turbo kit, same modifications, is going to make less power.


[Modified by Midori Shinkansen, 2:26 PM 12/21/2002]

 

Common now.. if you have a choice, get vtec. I also have friends with turbo b20s and b18As that went nonvtec for their turbo, but are now looking for vtec heads/motors.

 

if you dont plan on building the motor... LS turbo is the way to go. HANDS DOWN.

 

i dont believe the GSR has better gearing for boost. The LS does. For a turbo set up you want longer gears so you give the turbo more time to spool up.

 

Dont listen to him....He is biased.

 

as for the ls having lower compression #'s, the bottom line is the total amount of air stuffed into each cylinder. lower compression+bigger boost and higher compression+lower boost will net in theory be the same. Who cares if you can have more boost if you still aren't making as much HP as a high compression motor with lower boost. The GSR head flows better as well.

 

Thats a myth. How many "RACE" car use an LS tranny compared to say a Tpye R tranny which has shorter gears than a LS.


[Modified by BVM, 4:49 PM 12/21/2002]

 

LOL i love when people say that...idiots

 

no im not.

 

So I can run 10psi on stock internals? I would boost it after I/H/E/cams/gears. Would it be ok to boost at 10psi with those mods?

 

boosting after i/h/e would be the dumbest thing u could do... you'd have to get rid of the i/h ......
and as for gearing, If you want to drag race, and are still turning in time slips above something like 11.3, you will want the shorter gears of the gs-r tranny. However, if you are planning on boosting over 400 whp stick with the LS tranny. also, If you want crushing top end power and speed, go with an ls transmission, and it's longer gears. I personally like racing from rolls, hondas weren't meant to drag race, theres an absence of torque, and it just takes too much money to compete with domestics in the 1/4.

 

posting in the integra forum is a waste. head over to forced induction.

the prelude has an extremely weak block, scratch that idea.

the ls tranny sucks.

whoever says "long gears help you stay in boost" is retarded. great, you're staying in boost. that doesn't mean you're accellerating efficiently.

gsr is better all around. just boost around 7 psi with a drag or revhard kit on a gsr and you'll be plenty fast.

gsr turbo