Im planning a motor build this summer... mild (165-180whp)...and ive been toying witht he idea of an LS VTEC. I attend autocrosses sot ehmotor will see high RPM quite often.... wondering if an LS block, shotpeened factory rods, PR3 pistons, new oem rod bolts, bearings, adn rings, with a balanced crank will withstand revs?

or would it be a better idea to just use a B18C1 block?

just hunting for experienced opinons, thanks in advance

 

I would say go with the GSR, I just did a L/S Vtec last year lasted 5-6 mths rod bearing went I did a cheap build no APR rod bearings so my fault but I was over reving it. I'm now building a GSR for more reliable motor I hope
Just my 0.2 Rob

 

LSVTEC motors are perfectly reliable. A motors reliability is only as good as the skill of the person putting the motor together. I could give two people the same parts to assemble the same motor, but I guarantee you if one of these people was a first timer and the other was an experienced engine builder, the engine builders motor would probably last longer. My whole point is, if you don't know how to do it, then don't. If you know how to build a motor, then an LSVTEC motor really is no different than any other. Me and Sander have built his LSVTEC motor twice (first time was fine, but he wanted more compression ). In total, we have put about 20,000 daily driven miles on that motor with 0 problems.

 

I am surprised more people don't consider blockposting on ls/vtec's. Its cheap insurance in my opinion.

A good machine shop should be able to do it for $100 or so, and the parts are only like $10.

 

Block posting is easy to do yourself, you just have to make sure to do it RIGHT. If torqued too much, it will distort the sleeves and cause problems. Here is a how-to done by Homemadeturbo.com on block posting http://www.homemadeturbo.com/t....html

 

I wouldn't do it yourself unless you REALLY knew what you were doing and had the right tools.

The posts need to be torqued to something along the lines of 2 inch/lbs. Where you place them is critical, not only in ensuring that they are effective, but also to prevent the sleeves from becoming eggshaped. Securing them effectively is also beyond important.

I am the type of person that likes to do just about everything himself, but this is one thing I will leave to those with better tools just to be sure.

 

I agree with you that if you don't have the right tools to do it properly then don't do it at all. But if you have a torque wrench that can measure in inch-pounds and have a tap and some brains, it wouldn't be too hard. Also, that write-up says to use JBWeld...please don't JBWeld WILL leak, I promise. use that Devcon Aluminum Liquid stuff, I am sure it is stronger and would provide a better seal.

 

im not really talking about day to day drivability reliability... im talking about.. in autocross you are pretty much way on up there on the tachometer the entire time... LS blocks just aren't designed for that sort of abuse. especially being wrung to 8000rpm. and adding a block girdle, balancing the crank, etc. etc.... will the cost add up to surpass the price of the B18C1 thats designed from the factory to go to 8000rpm. ya see what im sayin?

thanks for the input though.

 

That LSVTEC that me and sander built, that motor has held up with several autocross runs, backroad runs, and daily driving. LSVTEC motors are perfectly reliable if built right. If you don't know what you are doing, then go buy yourself a GSR swap, put it in, and don't touch it...just drive it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16a ferio &raquo;</TD></TR><TR><TD CLASS="quote">That LSVTEC that me and sander built, that motor has held up with several autocross runs, backroad runs, and daily driving. LSVTEC motors are perfectly reliable if built right. If you don't know what you are doing, then go buy yourself a GSR swap, put it in, and don't touch it...just drive it.</TD></TR></TABLE>



-sander

 

LSVTECS are perfectly reliable engines...

This is my setup.

Engine Block: ’90 Integra LS B18A1. Balanced LS Crank, LS Rods, CTR Pistons (12.4:1 Compression), AEM Crank Pulley, Toda flywheel.

Cylinder Head: JDM Ported ITR Head, ITR Cams, Titanium springs and retainers. ITR Intake Manifold, AEM Cam Gears, JDM ITR Header, ARP Head Studs, MSD Plug Wires.

Transmission: YS1 LSD and ACT stage 1 clutch and Star pressure plate.

Misc: AEM Short Ram Air Intake, Apex’I VAFC VTEC Controller.


I drove from Arizona to North Carolina at 4300 RPM @ 65-68 MPH getting about 25MPG.


Good, reliable, and have a lot of power!

 

good to know id have someone with more experience than I assemble it... several friends of mine/aquaintances have done LS/VTEC setups, but they're all drag racers

thanks for the useful info/testimony

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sean EH2 &raquo;</TD></TR><TR><TD CLASS="quote">good to know id have someone with more experience than I assemble it... several friends of mine/aquaintances have done LS/VTEC setups, but they're all drag racers

thanks for the useful info/testimony </TD></TR></TABLE>

Drag it! WTF is wrong with Drag you nutnut!

BTW, you need any parts, im here

 

GSR block with LS crank