MyHotsh

Hi,im new to turbo charging a car. Im in the process of building a ls/VTEC motor for my Ef hatch. I was going to go NA but change my mind and want to do Ls/VTEC Turbo.

I have a b18a1 block with a gsr head. As of right now everything is still stock. I have p30 pistons on shotpeened ls rods that i was going to use but im not...way to high compression for turbo.

I'm curious as what setup you ls/vtec turbo guys are using on a stock block and what numbers your getting?

This is going to be a slow and long build for me bcuz i want to do it right and do it once. Im not trying to build a rocket just something with a little more pep..Boosting around 8-10lbs

Im in the process of searching and reading alot on here, but some info and guidence from you turbo guys will be greatly appreciated.



Modified by MyHotsh at 8:06 AM 5/15/2008

Schister66

What is your static compression with the setup listed?? High compression doesn't limit your overall power goal, it just dictates which octane fuel you'll have to run in order to reach certain goals. Also, dont base your goals in terms of PSI...rather, in terms of whp.

MyHotsh

According to zealautowerks.com, my compression will be 12.5 will the p30 pistons.

Schister66

That's a bit steep. Generally i'd say go for it with the right tune, but since these are stock pistons, i wouldn't recommend it. That's not to say you couldn't turbo it, but your goals would have to be pretty small or you'd have to run a rather high octane fuel (100+) in order to combat detonation.

MyHotsh

Thats what ive learned in the little bit of research ive done so far about building a turbo car .

Thats the reason im asking those who have built a ls/vtec turbo already what set up are they using. Im trying to get an idea of what pistons and rods to use on a stock block on low boost.

Can i use my ls rods with a turbo piston?

LA_HONDAS

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MyHotsh &raquo;</TD></TR><TR><TD CLASS="quote">According to zealautowerks.com, my compression will be 12.5 will the p30 pistons.
</TD></TR></TABLE>

ls/vtec with p30 pistons will be 11.6:1 c/r not 12.5:1 c/r

MyHotsh

Is that with a GSR head? Where did you get that info?

I got mine from zealautowerks.com..check it out.

ls block b18a1
gsr head
p30 pistons
oem Ls head gasket

Rickdrizzle

according to c-speed racing. its 12.163061

MyHotsh

Thanks , but thats still to high to boost.

anyone mind posting their ls/vtec turbo setups?

Thanks for any help and info..

Rickdrizzle

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MyHotsh &raquo;</TD></TR><TR><TD CLASS="quote">Thanks , but thats still to high to boost.

anyone mind posting their ls/vtec turbo setups?

Thanks for any help and info.. </TD></TR></TABLE>

can't you just slap back on the stock pr4 pistons? and what are your power goals?

MyHotsh

I can put the stock ones back on but i figured since its apart already i can upgrade to something better. Like i said before im not trying to build a rocket just something faster. I'd be happy with 250-350 hp.

MyHotsh

Sh*t ill be happy to go over 200hp. This is actually my 1st motor build. and i want to do it right and make it last.

Rickdrizzle

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MyHotsh &raquo;</TD></TR><TR><TD CLASS="quote">Sh*t ill be happy to go over 200hp. This is actually my 1st motor build. and i want to do it right and make it last. </TD></TR></TABLE>

People claim that the stock safe point for a b series is 300whp. So I'm pretty sure you can use the stock pr4 pistons and rods.

MyHotsh

Thanks for your help and info. I'll keep that in mind if i choose to save money instead of buying new pistons.

Anyone else mind giving some helpful info or tips on my build?

Thanks!

LA_HONDAS

put ls pistons back in it and call it day all gotta do

and put some arp rod bolts in it

cuz it's gonna let go from revving it to 8200+ rpms with boost

MyHotsh

I have the ARP rod bolts and headstuds already, thanks.

Bjorn20

if the engine is already torn apart, why not just get some low compression forged pistons in there? That way you wont have to worry about the oem pistons being a weak spot in the system. You said yourself... you want to do it right. Not neccessarily saying the oem pistons couldnt handle it but its w/e.

Also, theres an ls/vtec turbo thread somewhere in in the forced induction sections i think.... do a quick search on that and you should be good to go


edit: IMO the most important aspect of any efi engine build is the engine management system and tuning.

MyHotsh

Thanks. Can i get that link please? Im also looking into what engine management i want to use. Im thinking more in the line of Hondata s300.

Any suggestions?

GT35R_EF

as far as EMS goes it's all about preference. Does your tuner specifically recommend a certain system? If he absolutely prefers the s300, and the $600 you will spend won't empty your pockets than go for it. It is great and regardless what people say, I think it's worth the money. If funds are an issue, consider crome and find a reputable tuner. good luck!

MyHotsh

I have a stock p28 and a stock p72, both obd1.

Which of the 2 would be better for tuning this set-up?

I am clueless as to what goes into tuning an engine. Would the tuner use the stock ecu and put a new chip in?

I have an idea of who i might use to tune my motor, but thats further down the line. I need to get all the right parts for my motor 1st.

Bjorn20

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MyHotsh &raquo;</TD></TR><TR><TD CLASS="quote">Thanks. Can i get that link please? Im also looking into what engine management i want to use. Im thinking more in the line of Hondata s300.

Any suggestions?</TD></TR></TABLE>

https://honda-tech.com/zerothread/1509557