Hey guys, ive been hearing a lot about the lsvtec stock block only holding about 350 hp safely. I have worked on toyotas, mazdas, and nissans mostly, bit i just recently started working on hondas and have my own eg with an lsvtec that ran a 12.5 @ 114 mph at 6psi, now my dads friends who have worked on hondas tell me that stock ls pistons and rods hold 20psi safely, with a nice tune, and that should be around 500 hp guesstimating, now, i wanna know what you guys think, i have everything i need including fuel system, valve train, and ecu in order to do it, its is not a daily driver, would this be a safe build?

 

Change the rod bolts to arp an ur good

 

Yea the rodbolts would have to change. I wouldn't trust the advice of someone just telling me to run a certain psi though. Be prepared for breakage cause its def not certain it'll hold.. The stock rods is def the weak point. You could run a set of used eagles with some Nippon pistons if your really on a budget. If a rod breaks its gonna do some damage. If it were me I would hold tight till i could upgrade.

 

I wouldn't trust a stock bottom end at that power level. build it.

 

Build the bottom end, better safe than sorry..

 

piston and rod combo and your good to go, stock bottom end would make that power but it wouldnt last long

 

How much u trying to make cuz if it going for 350-400 on e-85 stock bottom end with arp rod bolts new gsr oil pump an gsr water pump ull be fine, on the head go with oem head gasket arp head studs itr cams should be fine with 15-17 psi

 

Yea, thats what i was told, on e85 with stock bottom end, i hve arp headstuds, a block guard and arp rod bolts already in it, im not really runnin on a budget, i just like to run as fast as everybody with less lol

 

I had similar goals and decided to build a piston and rod motor just to be safe also a friend turned me on to the guys at CNC and thier cylinder support system ..i will be sending my block off asap Better safe then sorry

 

Yeah, thats true i guess, i was planning on running 2 block guards until i send out my gsr engine, i have one that bust a sleeve so my plans are on building that one with the ls crank, or i might just buy a k series and call it a day, not sure yet

 

First off, two blockguards would not fit in the water passage because its tapered and your better off using nothing than a block guard because it will break where its loose and there are always loose spots with blockguards. Then when you pound the blockguard down into the water passage, you will be egging the cylinder like crazy so youll have to bore it.

As for safely running 20psi on stock internals. That's just funny. For every 300+hp stock cylinder(never mind stock internals) that lasts there are 20 that break at the same power. This is why only friends of friends who heard from friends that know someone who is running 500 for two years without issue are the only people saying such nonsense. Any legit shop out there would never say such ignorant things.

 

Well, im sating this because i saw with my own eyes a stock ls block with stock internals doing more than 500 hp on e85, he refurbished his engine at the end of the year and all he bought was new bearings, he is also using 2 blockguards and he hasnt had a problem with it, he told me that the problem isnt boost or wear or anything, the problem is the perfect tune for that build, as long as i Have a little more than enough fuel to back me up, i should be good he said, also, idk if you have ever heard of eggy racing? He uses a stock ls crank and stock sleeves, and hes the fastest stock sleeve car right now with a gsr, ran a 9.1 @30psi or somtihing like that, only thing he blew was the head gasket, im not saying this because a friend of a friend, my budy owns the car, an integra that has ran high 9's on e85, and my other buddy who has ran with the stock sleeves, i just wanted to know what you all thought, i disnt want to take a huge risk and break my motor before i finish my other one

 

two block guards? now i've heard it all.

 

Hahaha, eggy racing uses a custom made one, its kinda like 3 put together into one

 

lol

that's the cncwerx cylinder support system. you know, made by the company the guy you quoted earlier represents?

 

Did this dude seriously just ask trickeng if hes heard of eggyracing........... Screw it go for 600 dude. It obviously doesn't matter what anyone here tells you. By the way trickeng is the one who did the machine work on his block. Notice the cool lil avatar and website in his Sig. Someone kill this thread.


Damn doood beat me too it lol.

 

Yes (giggle) I know the eggy racing car. He is also running the CSS process not a blockguard, with forged internals.

There are countless people who have run 500hp on stock blocks "for a while" but in the end all it takes is a hick-up and you have a cracked sleeve. Again, for every success story even on E85 there are 20+ blocks which crack at the same power. Its a gamble even if you have the best of the best tune your car. As for stock internals, that's just asking for disaster even on E85.

 

Pearls before swine man. He got one guy to say it would work so he's good with it. Double.blockguard for the win.......

 

What Tirckeng said over and over, not to mention stock LS internals will NOT handle 500hp. you may get a couple hits on the dyno and at the track and then KABOOM catastrophic failure big time. I've personally puched the envelope on both stock bottomend LS and GSR and the LS gives up LOOOOOOONG before the gsr does.

 

Lol my bad guys, its like i said i just now started on hondas, im just saying what alot of people tell me is true and seeing if it is for myself, i understand that ls internals are weak and so are the cylinder walls, so i will be shipping my gsr engine to get it sleeved and in the mean time ill run my ls how it is,

 

I have a stock LS/vtec car that I tune that's been 11.2@128 on 93 octane car weights 2300lbs. I never dynoed it but I think its in the 425whp range. The short block has been boosted for well over 10 years and has seen 28psi with a boost control malfunction. I know that it will live at 500whp on race gas..

 

350whp is no problem with a good tune and a decent setup. dont be expecting to make that with crap turbo kits and log manifolds.

 

LOL the car I posted above is on a log manifold and a John Deere turbo from a lawn tractor.. The car has won a few 11.5 index races as well.


IMO the pistons are the weakest link. The rods will last if you don't rpm it... at 8200rpm it will live a lot longer. Keep the engine cool..

 

I ran 11.48@128mph on the rev limiter on 23" slicks & 8500rpm back in feb in a 99 civic si @ 2650lbs 20psi on a t3 Mercedes turbo, Stock B18c Just Head Studs and E85, Snapped a rod in 2 though on 23psi

 

Yeah my shift light is set at 7500 cuz i was told not to rev past 8000(though my msd box has the rev limiter function so it dosent rev past 8000 anyway), and im running an ebay t3/t4 turbo with custom turbo piping, i have the gsr intake with the little butterfly things, and okay, i want to run at least a high 11, would 350 hp do the job? My car weighs about 2200 lbs, i can still do some weight reduction on it maybe another 150 lbs