i know many people have written about th reliabilty of ls/tec engines. my ls has 120,000 miles. do you guys think it will blow up if i ls/vtec it with out replacing anything in the bottom end. i dont plan on reving past 7000? if not how many miles do u think ill get out of it before somthing goes?

 

do a leak down test first to find out if all the seals are still good.

 

i have done a leak down test and evrey thing is fine i did it about a month ago.

 

i would replace the timing belt and water pump too while you're at it

 

sad

 

replace the pistons too. 11:1+ compression > 9.2:1. as far as the rest of the bottom end goes, your stock internals will do fine up til 8000. a friend of mine has a 91 ls with a chipped ecu and he runs it up to 8000 with no problems. and he has 100k+ on it. plus the fact that your engine will be making its most usable power above 7000 anyway. good luck with the conversion; tell us how it goes after its done.

 

Just curious as to why you want an LSV if you don't plan on spinning it over 7k.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kendall &raquo;</TD></TR><TR><TD CLASS="quote">Just curious as to why you want an LSV if you don't plan on spinning it over 7k.</TD></TR></TABLE>

exactly. even if you do stay in vtec while upshifting at 7000, your car is going to pull much harder 7000-8000. that is where all the hp is. and the peak torque might be above 7000 as well; someone correct me if im wrong.

 

better off a low mile engine, i did mine at 110k and only got like 30k out of it but i was also using for races on street and strip!!!

 

well, low miles is always better. BUT, my 126,000 LS runs mint, with perfect compression across the board, and pretty good leakage test results. i am contemplating on doing the conversion to my car; not because of reliability/longevity, but because of my future financial situation.

 

well would i just be better of spending that money on stuff like a throttle body and a intake manifold with venom fuel ril and some crower stage 1 cams? im already running a 55 shot of zex. just lookin to hit like 180 whp with out my nitrous

 

you will NEVAR hit 180 whp on an N/A LS. and no, dont buy the manifold. TB and IM will give you like 5-10 whp, and cost you 6-700 bucks. i say go with lsvtec if your engine is in very good running condition. you will hit well over 180 whp on a well tuned lsv with bolt ons and type r internals.

 

I would say go ahead and freshen up the bottom end.But then it all depends on if you want reliability or you just wanna say hey i got an ls/vtec under the hood. Just do it right the first time and save yourself some money. just my opinion.Good luck.

 

yea i would agree with do it right the first time. i spun a bearing in my ls and then i didnt turn the cranck when i replaced the bearings, and blew a big hole in the block, now i cant do ls vtec. so it will cost me for a whold new engine. so yea i would get the pistions and new bearings if you are going to be reving high

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kendall &raquo;</TD></TR><TR><TD CLASS="quote">Just curious as to why you want an LSV if you don't plan on spinning it over 7k.</TD></TR></TABLE>

you'll want to join the darkside of the 7k.

 

would it be safe to put itr or ctr internals in that ls with a vtec head anr rev to 8000