This might be a stupid assumption but i've been researching a bit and found that some people are spending money to build an Ls vtec but then lowering the compression in order to boost. I thought the whole point in the "frank" was to raise compression and go N/A! Why wouldn't you just lower compression and boost a gsr? Does Ls Vtec have more than 1.8L or sumthin? Like i said...probably stupid...but maybe not!

 

very stupid yes.

a stock "ls" has a lower compression in the first place. so no that is not y ppl do it.

and no it is not the illest 1.8 litr.. it has a longer stroke. litres are usually rounded when rated.

 

Exactly. OP, the LS bottom end with its 89mm stroke displaces 1.834 liters, when the GSR bottom end comes in at 1.797, which gives the LS block more low and midrange torque (if I can even SAY that for a 4 cyl Honda motor, LOL).

One of the main points in turbocharging an ls/vtec motor IMO, is to take full advantage of the freer flowing vtec head over the anemic LS head, for substantial whp gains. Another point is the powerband that it'll give certain users who want it that a GSR, B16 wont deliver, due to the shorter stroke.

Different strokes for different folks I guess, no pun intended! ;-)

 

ill take you for a ride in my turbo lsvtec so you can see why i did it.lol

 

i think the real reason is that everybody has 20 LS blocks laying around, so it becomes cheaper than hunting down a gsr block lol. that and the LS crank uses a beefier rod

 

he never ride 500whp stock block pump gas one... That I have LOL

 

ls motors a cheap.. gsr motors are more expensive and harder to find.. and you make more power with the ls than a gsr..

 

^^ you mean more ft/lbs of torque.

 

Lol, you probably right Joe, I got two in my shed now! ;-)

X2.

 

ya thats what i meant lol..

 

LOL @ thinking 37ccs is gonna make a BIG difference in torque... If you looking for worthwhile gains with Bseries... you might as well go with the B20vtec

Its has basically just turned into a cheap(er) alternative to GSRs and Type Rs... And you may pick up 5ft/lbs

But yea LS/Vtec are great motors... IMO I just wouldnt say im doing that headswap looking for more torque...

 

People try to sway away from b20 blocks due their fairly weak integrated cylinder sleeve design, so most ppl who are turbocharging b20/vtecs are sleeving them (but not all, most). If you take that LS block, sleeve it, and do an 84mm bore, you'll have the same displacement as the B20 (84X89).

I wouldnt either, I would do it for whp gains over the LS head.

However, Ive seen 60-1 equipped LS motors reach maximum pressure at 4500 rpms, then spool the GSR/B16 at 55 to 5600. Go figure.

 

I was thinkin about it today and kinda figured an LS Vtec had more displacement. Thanx for the help. I'm just trying to figure out what type of setup I wanna build for my new EK. As far as I can tell looks like Boosted LS Vtec now! Ha!!

 

Good **** my dude...

 

People generally put in forged rods & pistons when they build a turbo motor. At this point, the only things the GSR has over the LS is a mains girdle and vtec oil hole. Squirters are fairly useless, and the when have you seen an LS block twist the mains because of no girdle? The LS block has more displacement, can use the vtec oil/h2o pumps, WIDER rod bearings, and doesn't need a squirter-delete kit. You'll need an oil source for the turbo anyways, so the vtec lines are a moot point.

Overall you can save money and get some better advantages with an LS block. PRICE it the main reason. I find 10 LS longblocks for every GSR. Best price I got was $300 for a BARE GSR shortblock, while I got a complete LS longblock for ~$200 (deducting extras).

 

http://www.youtube.com/watch?v=1jo4o...e=channel_page

this is a kid's DA that i went to HS with. ls non vtec...

 

I hate to sound rude, but it just looks like he doesn't know how to drive, bouncing off the limiter all day trying to get traction. :smile: "And...here we go..." *rev limit* *pop* *Pop* *rev limit* *rev limit* *pop*

 

i said i went to HS with him... hes not my friend.

http://www.youtube.com/watch?v=EqcxYGsYpuA

another video of him doing a run at pacific raceways, he hits the limiter twice.

i dont know if its true or not, but i always herd he went through 3 gsr trannys, the car has power... but not that much power.

the first manual tranny car i owned was my h22 accord... i could barely drive a stick when i first got that car... i killed it once at a stop sign on a hill (had an idle issue) i missed 3nd once while racing a z3 and i accidently went from 4rd to 3rd and drumped it and reved it to 8500 cuz i was slamming on my breaks and down shifting as an elk ran infront of me on 410 while i was passing someone.

I know my car stops making power around 7000 rpm with my type s internals, i know my rev limiter is 7845, theres no purpose to run it that other 845rpm since im no longer building power.

but i can honesty say ive never hit my rev limiter on accident.

 

this is my turbo ls/v on pump
412hp vs 500hp svt cobra

http://www.youtube.com/watch?v=eXLMNIeRcek

 

How much power?^

 

i just put it

 

14.5

312hp and 245ft/lbs

he was running 18 on that street pull. and it runs mid 12's in the quarter... definitely a quick DA for having 300k on the chassie lol.

 

Check out my LS Vtec Turbo....:

http://www.youtube.com/watch?v=KX5nMi0wRvA

 

haha. that DA i posted was Jeffs DA... everything that was done to that car was from speedfactory. and ive seen you around quite a few times.

 

yah... I spoon main bearings last Saturday on the dyno. :-(