Pistons, Rods, & Head HELP

[rocko5845]

I built a monster D15B7 with a T3T4 turbo and all the other goodies to go with it. I put in the Vitara Pistons with the stock rods and that put the compression at 6:1. I did this because I couldn't afford the rods at the time. I ran the car for almost 1,600 miles and blew a head gasket (I think). Now I am taking it back apart to fix the gasket and replace the stock rods with some much better.

Looking for people with a lot of experience to help me out!!!!! Must keep lower than 9:1 comp with rods

What are the best rods to use with the Vitars? Are there any rods that can be used that DONT require knotching the block? Anyone know of a piston/rod setup thats better and still decent priced?

Thanks

 

[DarkCreep]

Rods mess with the compression of an engine?

 

[got traction]

Rods mess with the compression of an engine?

yes....the rod length plays a factor in the compression ratio


just pick up some Eagle H beams, they are cheap and will withstand the abuse. You may or maynot have to notch the block, and it will keep your compression in the 8 something : 1 ratio.

 

[2NRSTV]

Eagle H Beams are the same spec as the D16Z6 in length (137mm).
The D15B7 on the other hand has a rod length of 134mm.
This, coupled with the Vitara Pistons that have a dome of something like -15cc and a compression height of about 28.3mm should put your engine at about 7.67:1 Compression Ratio. Ask them how much they are going to need to mill off the head if they have to mill it, because that will raise your compression too.

 

[eg6white305]

Your compression is now 6:1 ? Eagle rods are good but go to fjdistributors.com! Fj rods is what i would get.

 

[2NRSTV]

Actually, I think the FJ's are a bit longer than the D16's. I think they are about 138.6mm +/- about .05mm. The FJ's will keep you below a 9:1 CR. The FJ's will put you at about 8.64:1.

 

[DarkCreep]

Learned something new today thats pretty cool.