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I have a spare z6 block (claimed to have only 65k miles on it) that I will be building up for boost over the comming weeks. Vitaras, TT rods, Cometic gasket, ARP head studs, blockguard, OBX oilpan, new oem misc. stuff like oil pump, bearings, etc. The one thing I just cant decide on, is 75mm or bore .030 over & 76mm vitaras.

I will only be running 8-10 lbs while scooting around town, and maybe 16-18ish at the track. If that matters...

Your $.02 would be greatly appreciated.

Thank you.
 

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I personally would not bore your block any unless you sleeve it, as you can guess, a thinner sleeve is more prone to crack.
 

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O 16581 72452 5 said:
I personally would not bore your block any unless you sleeve it, as you can guess, a thinner sleeve is more prone to crack.
If the cylinders are out of round then he has to bore of course. There was a member here using .040" over vitaras. I think it was berretaGTZ??? Maybe check with him and se how it's running.
 

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bvukich said:
I have a spare z6 block (claimed to have only 65k miles on it) that I will be building up for boost over the comming weeks. Vitaras, TT rods, Cometic gasket, ARP head studs, blockguard, OBX oilpan, new oem misc. stuff like oil pump, bearings, etc. The one thing I just cant decide on, is 75mm or bore .030 over & 76mm vitaras.

I will only be running 8-10 lbs while scooting around town, and maybe 16-18ish at the track. If that matters...

Your $.02 would be greatly appreciated.

Thank you.
i thought 76mm required resleeving???
 

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i'm surprise you're not going w/ forged pistons...it seems like a bit of track boost for the viagra pistons. pay now & enjoy for the long haul...that's my approach to my build up right now anyway. good luck.
 

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bvukich said:
or bore .030 over & 76mm vitaras.
76mm is .040 over, and so far people have had good luck with it.
red97tj said:
i'm surprise you're not going w/ forged pistons...it seems like a bit of track boost for the viagra pistons. pay now & enjoy for the long haul...that's my approach to my build up right now anyway. good luck.
#1 THEY ARE NOT VIAGRA PISTONS
#2 they have been proven to 330hp without breakage. rumor has it that 400 is the peak
 

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^ yup
 

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buah ha ha ha..Viagra!!! Thats hillarious

Answering the question posted..I would stay 75 mm if the cylinders look alright and if you want 300+whp..

With .04 over and stock sleeves i wouldnt go over 285-300whp since the sleeve is weakened by having less meat.

My Y7 had around 65k when i built for boost with the vitaras.. I used 75mm, 2 years later the car has the same 75mm pistons, driven daily at 18PSI(after tuned...before tunning at 12 PSI).
 

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Honestly if your going to go all out w/ oem bearings, cosmetic HG, etc., get some forged pistons and sleeve the motor :) . I don't know shit about the obx oil pan, interested now. I get the impression if your asking this your not to knowledgable about turbos..... this setup has been covered a million times, with success.
 

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fjt said:
buah ha ha ha..Viagra!!! Thats hillarious

Answering the question posted..I would stay 75 mm if the cylinders look alright and if you want 300+whp..

With .04 over and stock sleeves i wouldnt go over 285-300whp since the sleeve is weakened by having less meat.

My Y7 had around 65k when i built for boost with the vitaras.. I used 75mm, 2 years later the car has the same 75mm pistons, driven daily at 18PSI(after tuned...before tunning at 12 PSI).
when i was searching around for info on vitara pistons (some people just doesn't get my jokes...but not you fjt!!) i didn't find any definitive info like what you said,"I used 75mm, 2 years later the car has the same 75mm pistons, driven daily at 18PSI(after tuned...before tunning at 12 PSI)." so i went out & bought endyn pistons since i thought it's good insurance. i'm spending money for all the other sh*t already so what's a few hundred more bucks thrown into the money pit!!! i didn't want to cheap out then blow up my motor along w/ the turbo to save a few bucks...well that's my thought process anyway, but you've proven that the viagra pistons are performing well. so i guess i've wasted some money there...hey but at least i'm keeping the economy going right?!?:alky:
 

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trust me , before i decided to try these pistons i watched closelly a friends ride that was/is built with them.. At first i was like WTF are you doing putting Suzuki pistons on a honda?.. but after seeing his results i gave them a try and i was not disapointed..That friend has run these pistons for almost 4 years noe, he has refreshed his motor with new pistons 1-2 times but everytime he does he just puts in new fresh vitaras...and i dont think he has spent on all those sets what he would have paid for just 1 set of aftermarket forged.
The best thing is to read all those guys that post "i blew my setup help!" and when you go in they had CP/Arias/Wiseco etc... forged pistons and paid over 350 for a set.. when i am happy with my cheap 100 bucks pistons..
 

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fjt said:
trust me , before i decided to try these pistons i watched closelly a friends ride that was/is built with them.. At first i was like WTF are you doing putting Suzuki pistons on a honda?.. but after seeing his results i gave them a try and i was not disapointed..That friend has run these pistons for almost 4 years noe, he has refreshed his motor with new pistons 1-2 times but everytime he does he just puts in new fresh vitaras...and i dont think he has spent on all those sets what he would have paid for just 1 set of aftermarket forged.
The best thing is to read all those guys that post "i blew my setup help!" and when you go in they had CP/Arias/Wiseco etc... forged pistons and paid over 350 for a set.. when i am happy with my cheap 100 bucks pistons..
hey good info...this is from the horse's mouth & not hearsay!!!
well hopefully you've saved someone some bucks when they do a search on vitara pistons...it's a bit too late for me since i took the plunge already. humm, maybe i can sell my endyn off & by some viagra pistons!!!:noway:
 

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fjt said:
The best thing is to read all those guys that post "i blew my setup help!" and when you go in they had CP/Arias/Wiseco etc... forged pistons and paid over 350 for a set.. when i am happy with my cheap 100 bucks pistons..
yup, ive seen forged go to shit because of bad tuning. i mean pistons that look like they were hit with an axe and split down the side. and these were setups under 300hp.

with a good tune, Vitaras should hold up just fine. the majority of people that "build" D motors barely peak 300hp anyways. its not as easy as most people make it seem
 

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guest said:
I get the impression if your asking this your not to knowledgable about turbos..... this setup has been covered a million times, with success.
What gave you that impression? I know EXACTLY what I want to do... Except for what size piston to use.

Thankfully fjt came in with exactly the type answer I was looking for. (If you do X, Y will happen, because of Z)
 

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fjt said:
trust me , before i decided to try these pistons i watched closelly a friends ride that was/is built with them.. At first i was like WTF are you doing putting Suzuki pistons on a honda?.. but after seeing his results i gave them a try and i was not disapointed..That friend has run these pistons for almost 4 years noe, he has refreshed his motor with new pistons 1-2 times but everytime he does he just puts in new fresh vitaras...and i dont think he has spent on all those sets what he would have paid for just 1 set of aftermarket forged.
The best thing is to read all those guys that post "i blew my setup help!" and when you go in they had CP/Arias/Wiseco etc... forged pistons and paid over 350 for a set.. when i am happy with my cheap 100 bucks pistons..
I have to ask you, is that a Toyota Starlet on the background? anyway about a coment that you mention in another thread, about how in Puerto Rico they will use the most crazy combination "a lot of times cheapest" but the results be incredible, I have seem guys run crazy numbers in the street and in the track for a long time and when they break, the very next day they have the car running again. I'm looking for forge piston for my set up I think im going .020 = 20 over. the secret with the combination back in puerto rico and here as well is the tunning. if you car is 100% fine tune, you wont have any problems and you will see great results. I'm building my engine with forge piston, undecided wich ones, and eagle rods just to be in the safe side in case I do something stupid, hopefully it will hold a little bit better. After I have my set up fine tune 10000% then I probably try the cheap way, just to save me money.
PS- Looking for a place that sells, forged piston 8.5:1 , .020 over, Eagle rods, ARP head studs, a good gasket, maybe I get the fuel pump and injector too if they have it. and a block gard. at a good price with excellent serv. and shipping. can someone help me out?
 

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thats an old school Corolla in the back..Its not the starlet chasis(Hatchback) but ppl do a lot of rotary swaps in these cars.
 
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