[iluvmyinteg]

i got a 95 integra ls and i'm gonna do the ls/vtec with a b16a head and pistons... i wanna know if buying a p28 ecu chipped with a mugen program that is for a DOHC... the guy says v tec hits at 5700 and redline is at 9500... or should i just buy a 94-95 gsr ecu???

 

[Godspeed]

the reason you want to use a p28 is because it dosn't need a knock sensor, and your ls block dosent have a knock sensor, unless you put one on it, you might want to look into the vtec turn on point, you might want it lower, but then agian that might be a good point but i do know that if you put the gsr ecu, you will throw a code, unless you have a knock sensor

 

[LsVtecR]

i've got the ls/vtec swap done in my car. i still have the same computer because i didn't want to rev to high because the ls block won't be able to handle high revs. of course i didn't put new pistons in my car so i don't know how much of a difference that might be. i put on a blockguard too because i was told it would help my ls block out.

i'm just saying that 9500 sounds a little to high for me. i'd be scared as fuck to go that high.

 

[GSR]

i've got the ls/vtec swap done in my car. i still have the same computer because i didn't want to rev to high because the ls block won't be able to handle high revs. of course i didn't put new pistons in my car so i don't know how much of a difference that might be. i put on a blockguard too because i was told it would help my ls block out.

i'm just saying that 9500 sounds a little to high for me. i'd be scared as fuck to go that high.

I'd go with the GSR ECU and put a knock sensor in there if you can. 9500RPMs is very high for a stock block LS/VTEC engine.

 

[tegragsr01]

gsr ecu will work fine that is what i would use but dont worry about your bottom block the ls block it a brick it is very strong so dont let that stop you from anything.

 

[Godspeed]

don't worrie about your bottom end, well, and you can correct me if i'm not wrong but i belive that you need to be careful with that bottom end, i know there is a post on here that has a link to a web site that shows you why you need to be careful with the ls/vtec, it says something about, if it was so great then honda would have already done it, if anyone knows i think it would help him out a lot, i know that with the gsr ecu you have to have a knock sensor, that ecu will throw a code if it dosen't find the knock sensor, the p28, or getting your ecu chipped is a better way, or if you add a knock sensor then that is good to but you will want to be careful with that rev limit. but agian i say do the search you can find so much on this site and on the net abut this subject.

 

[Godspeed]

i found the web site, http://www.hondastyle.com/news/wmview.php?ArtID=5 , so check it out, that should help you, i say you should just save the money, go turbo, or buy froged pist/rods, and go with a huge shot of nos+ jacobs mastermind, but hey you do what you want just make sure you have no regrets

 

[550hplsvtec]

I have done this conversion many times. My advice would be to run the GSR computer. add the wires for the vtec solenoid, oil pressure switch, and the knock sensor. since the Ls block does not have a place for the knock sensor simply zip tie the sensor under the dash somewhere with the wire running from the ecu to the sensor and the trick to making the sensor work is that the threads of the sensor must be grounded so take a small
hose clamp and a piece of wire, strip it on both ends, put the hose clamp around the knock sensor threads leaving it loose enough to slide the stripped end of the wire under the hose clamp and between the threads. tighten the clamp and ground the other end of the wire and everything will work fine with no check light and a safe rev limit of 8200. good luck.

 

[GsrRacer]

How much will it cost to do ls/vtec including parts and labor. Whatll be the redline on it and whats teh highest rpm you could safely go iwthout anything being damaged?

 

[550hplsvtec]

the cost of doing ls/vtec can vary depending on where you get the parts. Some of the things involved with doing the ls/vtec is welding up the a pressurized oil feed hole that is normally feed from a port in the vtec block that doesn't exist in the Ls. This hole is on the head surface near the intake side below where the distributer is located. it is silghtly diagonal from one of the dowl pin holes. Bringing the head to the machine shop to have this done will probably cost around 40 to 50 dollars this is a very rough estimate. you will also need to get the head surfaced after being welded and that may also be around 50 bucks. next you will have to drill the head bolt holes out on the intake side of the head and only the ones on each corner to accept the dowl pins which are normally on the two corner exhaust side head bolts.
you can be brave and do this yourself or have a machine shop do it for probably another 50 bucks. you will need to run a Ls head gasket, do not by a knock off this can range from 70 to 80 bucks. last but not least either gsr or B16a head studs or bolts. how high you rev the motor will depend on how stiff your valve springs are. but if this is going to be a daily driver I would just rev it to 8200 which is where the gsr computer will cut out
good luck

 

[AcuraBro]

More

That article on Honda Style is written by a guy that I've known for a couple of years. He knows his stuff, but I disagree with him in some aspects. I have a pretty crazy LS/VTEC motor (It's not in the car right now). The reason for doing LS/VTEC really, is it's a poor man's GS-R. Sure, the stroke is 2.5mm longer, which gives you a tad more displacement, but it also puts greater stress on the rods. How high you can rev isn't really a very documented thing. You have to remember that the oil jets which cool and lubricate the bottom of the pistons on a DOHC VTEC block aren't present on an LS block, and can't be put in (so don't try). I'm looking to establish a higher redline (I use a P72 ECU w/ my LS/VTEC) but I haven't decided yet. The cam's I want to use make power all the way to 10,000rpm. I guess I have until September to decide.

 

[randyman]

if ur looking for an ecu for ur ls/vtec setup, try getting the p28 ecu with a dohc vtec program. the mugen program is ok. but that program will run ur car rich (check the hondata site for specifics). a skunk program is nice too. ask around regarding vtec activation points and rev limit for ur setup.

i see that u have a "stock" ls/vtec. if u use the gsr program on ur b16 head/ls block combo, u really won't be optimizing the stock program. the gsr will engage vtec at 4400 but it'll try to look for the secondaries so that it can open it up at 5600. the b16 head doesn't have the secondaries.

i had a stock ls/vtec setup about 3 years ago and i revved my stock setup to 8000 with no problems. i even used N2O (55 shot) on top of that. as long as u don't go crazy with ur setup, ur going to be fine. even if ur rev limit is set at 11,000 it would be up to u to abuse that limit.

good luck with ur project.