alexg103

hey just a few questions so i have read alot of the stuff on here. so putting the vitaras in drops the piston highth .090 and i saw someone say you can just mill the block down about.060 and still gain some compression back to put you around 91-1 has anyone done this?

also i baught my rods used and block and everything the guy told me the rods of block do not have to be notched they were in there before... is there any way to tell what rods i do have?

willyboyK20

get the custom rods from fjt. They should give the correct piston height in the z6.
http://fjdistributors.com/index.php

alexg103

ya i have seen this but i already have these rods that i got from this guys i pretty much payed 110$ for rods pistons and block with arp head studs pretty damn good deal so i think i will use these ones i got. he said i dont need to notch the block of anything and these pistons were made for this block but the guy i have talked to him before didnt seem like he new too much and had gotten this stuff from someone else... so i gues si will have to wait tell i put it all together and see if they hit or not...

supraccordlx

Just run the pistons w/out milling the head if you're going the turbo route.

alexg103

ya i am gong turbo for sure...but 7.4-1 is pretty damn low if i could even get ti to 8-1 or somthing i think stock is like 9-1 right..... just opinions on milling the block down some to hain some compression


and also is it not safe to run the 75mm bore if i am not going ot be running 350+hp

TheShodan

iTrader: (14)

7.4:1 .. yuck.

fast2camciv

try 8.4:1

alexg103

no a z6 block with z6 head makes compression 7.4-1 thats why it takes you aroudn 30 pounds to be in the 400hp range and thas why they make special rods you can use to raise the piston back up to stock highth or like i was asking if its good enough to just mill the block down about .060 or so since the pistons sit down about .090


anyone else got any suggestions? and are using 75mm bore vitaras

fast2camciv

lol

i was the first person to make over 400whp on vitaras. (on 25psi with a 57 trim... JFK78 makes 471 at 30psi on the same turbo...far more than your "barely 400 with 30psi") ive built 6 vitara blocks on my own. they dont sit .090 down in the block, im not even sure where you got that info from. the one block that i actually measured it on, sat .020 down.
sure doesnt look like .090 in my pics now does it?
http://i134.photobucket.com/albums/q86/SIK_SOHC/block%20pics/block4.jpg

maybe to the bottom of the dish its .090, but deffinetely not to the top of the valve relief.

and if you enter these numbers (straight from fjt's website)
Piston Compression Height: 28.3
Piston Dish Volume: -15cc

into this calculator
http://www.knology.net/~jediklc/dcalc.htm

you get 8.4:1

RBrandonS

Alex. dont argue with the man. He is the OG 400whp vitara member. If anything take any advice he can give you to help with your build.

Townson

fj distributors has the custom rods to go with the vitaras now. i looked them up a minute ago.

alexg103

hey sorry fast2camciv i was going from jft on this thred he made here and was using this compression calculator

http://www.zealautowerks.com/dseries.html

when i use this one it keeps comming out 7.4-1

i have probably done somthing worng or the site sucks for the compression ratio

but hey i just want to say thanks for you input and everything just look for a cheap easy way to hold some power... and make it last.... and looks like you know how to do it!!!!!!

when use the calculator you gave me coes out 8.4 :S damn damn!

if ya got anything thing else to offer as help please do so thanks i am getting everything check out this morning (my block rods piston and crank cuz i got it all in a trade)

fast2camciv

if you have I beam rods, then you may not have to notch the block (i have never used I beams so im not 100% on that) but if your using the usual H beam rods, then yes you will have to notch the block. notching is not hard by any means...1/4" back from the cylinder, 1/4' down into the cylinder, and 3/4" wide. use a nice carbide cutter and in 30 minutes you will have it done. make sure to have the block cleaned and hot tanked afterwords...there will be lots of shavings in the motor after that.

fast2camciv

btw i just looked on my work bench, i had the compression test results written on the bench from my original vitara build...153, 150, 155, 155. that equals 8.5:1 a 7.5:1 motor would be in the 120-130 range.

ralph11sec

i made 400 on gt30 at 25psi. very easy to do...
but i agree, using eagle rods have a very low comp. when i switched to wiseco, a bit higher comp, i made a lot more power with same boost loevel

ryan89crx

i had to notch with my I-beams, but some manufacturers may be different

alexg103

alright well cool thanks i have i beam rods i guess i will just notch it before i even put it together just in case. did you use the stock oil pump? or did you guys shim or bore yours?

ryan89crx

just used a new OEM pump on mine, didnt shim it.

miller

Has anyone made 400+ on pump gas with stock sleeves in the world of the singles?

fast2camciv

not on pump gas that i know of....but i havent been all that involved in the SOHC forums for the last couple years. im sure its more than possible on e85 though

i did all the Endyn mods to my oil pump (shim and port) i was running a y8 block so i felt it was necessary.

narfdanarf

I believe JFK's was on "pump" gas..it was unleaded 101.

miller

Hmm, thats good to know. I just tuned a single to make 415ish on 93 pump with stock sleeves and a 60trim. I was rather impressed with the tourqe curve on the engine. I do think with some top end work like a better cam, bigger plenum manifold and good ported head this same setup can yeild over 450 on pump.

JFK78

Nice to see someone pushing it on pump, so that we can learn more about the limits of pump on a D series. 250tq was the accepted safe stopping point for a while, but I know several have pushed beyond that quite a ways.

I've been talking with the owner of this car you speak of, and am very interested in the details of the setup. Sounded like a pretty run of the mill build to me, with amazing power output for the psi level.

eg:R

i did a built vitara setup block for my bro. and the piston sit very low. im guessing around .060 lower. we mill the block a bit(.030) and ran a y8 head. dd suck

wilham320

iTrader: (1)

how much boost did it take?