Ls/Vtec----Experienced only please

[jcrx]

Forged = lighter + stronger = less strain.

[Jszy]

I see, I thought forged were heavier and thats where they got their strength from, the extra mass

[op012503]

is the ls/vtec motor making power past 7000 rpm? It probably does. So i guess you win in reliablilty and power by sleaving the block and changing the pistons and rods. I think you'd want to go with lighter weight rods. Im under the impression that the heavier rods are for turbocharger applications.

[jcrx]

Forged parts are stronger because of they way they are made, not because they are heavier, they are lighter.

And whether or not a lsvtec makes power above XXXXrpms is determined by the build, and whether or not the cams, pistons, compression, and so forth can make power that high.

[eckoman_pdx]

As jcrx said, forged parts are manufactored a certian way. Think of it as squeezing the living heck out of the metal and changing it's sturture, making it more stable. This will eliminate the microscopic holes and stress points, creating a stronger and lighter part. This is a bad example, but it will give you a rough idea.

Anyways, the forged parts are lighter AND stronger, where it be wheels, pistons, rods, etc. Whether you are building for N/A or Boost, you'll want Forged parts. They will give you the strongest part at fairly light weight.

Also, as jcrx said, the motor making power past 7K has to do with engine tuning, cam profiles, and whether the parts can efficently make power that high. Not all parts can flow the air and make power up high. Of course, the first part is making sure the parts CAN handle the strain of such high rpms, but if you are building the internals and buy qaulity stuff, you should be fine on that.

[indmny453]

not to sound like a dumbass or anything but i'm just now getting into this honda thing. are you all talking about say for instance taking a accord lx and putting a v-tec head and computer into it or what?

[jcrx]

No, we're talking about "frankensein" motors, which is talking a non vtec block, and putting a vtec head on it, most commonly hte Integra LS/GS/SE/RS motors B18A/B and the CRV B20Z/B. It can also be done with the H23 block, and H22 head.

[indmny453]

Originally Posted by indmny453

not to sound like a dumbass or anything but i'm just now getting into this honda thing. are you all talking about say for instance taking a accord lx and putting a v-tec head and computer into it or what?

thats what i was talking about. because i want to put a v-tec head on mine. just don't know what all i need to do that

[udelblue]

i know the eagle kits make a V/tec conversion alot easier. My question is will you have to get the head machined kif you buy the kit? i heard it include dow pins which make machining unnessary.

[udelblue]

hey does anyone have a dyno of a lsvtec motor?

[Jszy]

The eagle kit is what I am looking into also. I know you still have to tap the head for the oil line....which is prolly better left up to someone wiht some experience cause you dont want to fuck that up. Other then that, I think the eagle kit includes everything to put the ls/vtec together, but dont down play the wiring with the new ecu. I havent done it yet, but Im sure its not easy.

Im also looking for some dynos of an ls/vtec made from a b18a and a b16a head. Anyone got one?

[almxdupintegra]

WWW.IMPORTREVIEW.COM

[Noremac]

When i hopped on the dyno I was at 194 and then after tuning I think i was right at 200..I'll see if i can dig that up somewhere..
but that was before the pistons, intake mani, and cams.

[crv-tec]

What pistons should and LS VTEC run? I'm trying to research it all before I tear into it, so what pistons are the best for the LS VTEC. I'm hoping to build it with the LS block with a b16 head with a mild p&p. Also what should be done to the bottom end to try to squeeze another 500 RPM out of it? And what ECU would be the best for an LSVTEC? I've heard GSR, but still dont know why

[Greenblurr93]

wow, a regular bringing up an old thread.... thats not something u see everyday....and to answer your question.. Gsr ECU is best because it already has the circuitry for Vtec and the fuel map is set for the 1.8l displacement. as for pistons.. id leave the stockers in there, or get a nice set of JE ones.. as for squeezing out 500rpms, the bottom end should be fine with forged rods and pistons, but u may need a better top end.