piston & rod decision

[Hossein_Bader]

what combination of pistons and rods should I buy.
target: approx 25 psi & 300-450 hp

 

[UltraImports]

that's kinda a wide range. 1g rods and pistons should hold 300. People like to combo the 1g rods and 2g pistons for higher compression. It's up to you man. What's the $$ mean to you?

 

[Hossein_Bader]

i want some thing for approx 900$$
what do u think about eagle rods and JE or Ross pistons.

where can I order a gasget and seal kit for my engine. any site

 

[rdrkt]

For type of power I would suggest 1g rods on 2g pistons. It is a lot easier for the machinist to get that combo "right" than any other. If you wanted to go forged I would suggest ross\crower

 

[Hossein_Bader]

how many psi can I go with the 1g rods & 2g pistons (how much hp can this combo tolerate)

 

[Wilsonman02]

how many psi can I go with the 1g rods & 2g pistons (how much hp can this combo tolerate)

Enough

 

[Hossein_Bader]

enough like 25 psi

 

[rdrkt]

Enough like up to 500 hp to the wheels. Boost is totally irrelevant. This of it this way. Run a 14b at 25 lbs and you will be melting pistons regardless of what you do. But run a 50 trim at 25lbs and all you need is high octane gas. Being able to handle a particular boost will entirely depend on your turbo’s efficiency range.

 

[UltraImports]

back to the efficiency thread we go....

 

[na90dsm]

ok im new to choosing turbos and interested in this.what type of turbo would be your choice,or a premium choice to put down 500whp with 1g rods and 2g pistons,and what determines the turbos efficiency range.

 

[rdrkt]

Originally posted by na90dsm
ok im new to choosing turbos and interested in this.what type of turbo would be your choice,or a premium choice to put down 500whp with 1g rods and 2g pistons,and what determines the turbos efficiency range.

Someone could spend a hr or two typing out the pefect post of you could do a little bit of research on your own. Sports Compact Car has a couple of really great articles on how to read a boost map and what determines efficency. I personally think the 60-1 is THE turbo for big power. But a million other things come into play when trying to make that much power. Most importantly the size of your check book.

 

[na90dsm]

so very tru

 

[ZSPTurbo]

Originally posted by rdrkt

I personally think the 60-1 is THE turbo for big power.

sorry to hijack the thread, but what turbo do you think would work best for making ~ 400 bhp, at maby.... 20 psi?

 

[cucumber]

Originally posted by rdrkt

Someone could spend a hr or two typing out the pefect post of you could do a little bit of research on your own. Sports Compact Car has a couple of really great articles on how to read a boost map and what determines efficency. I personally think the 60-1 is THE turbo for big power. But a million other things come into play when trying to make that much power. Most importantly the size of your check book.

And the truth is, my checkbook is thin.

 

[rdrkt]

Originally posted by ZSPTurbo
sorry to hijack the thread, but what turbo do you think would work best for making ~ 400 bhp, at maby.... 20 psi?

I have a lot of thoughts on that but you should start a new thread

 

[Hossein_Bader]

this mes is to rdrkt
Enough like up to 500 hp to the wheels

So ur sudgestion to me is not to buy new pistons and rods?

 

[ZSPTurbo]

Originally posted by rdrkt

I have a lot of thoughts on that but you should start a new thread

its posted

 

[rdrkt]

Originally posted by Hossein_Bader
So ur sudgestion to me is not to buy new pistons and rods?

IMO its not necessary. If you have a 6bolt motor right now and its not blow just get it rebuilt. 91 rods machined to fit 95 pistons are the most driveable setup and they are pretty cheap. While you are at it mill the head deck the block get a Mitsu metal headgasket and ARP headstuds. That will be able to hold just about anything you want to dish out.

 

[sleeper142]

Originally posted by rdrkt
Boost is totally irrelevant. This of it this way. Run a 14b at 25 lbs and you will be melting pistons regardless of what you do.

youre right, boost IS totally irrelevant, but youre theory on the 14b i dont believe is necessarily correct. The thing about that is the efficiency range of that turbo isnt such that you could EASILY produce 400 hp. Ideally you want a turbo that is well matched to your engine... as far as engine airflow is concerned. Now rdrkt, i know you know youre ####, and im not trying to suggest otherwise but there is a great write up on vfaq on how to read compressor maps for turbos... this is the best way to learn about turbos and what turbo will "make" what horse power. However that is not exclusive to having engine work... but youre right its not really boost dependant, because a built motor (same compression) wont really give you any horsepower. It will enable you to make more horsepower SAFELY. I dont think a 14b would be efficient enough to make any real power at 25 psi, you would just knock pretty badly since its squirting out a lot of hot air, youd better have a pretty big front mount to cool that off. On the dyno and track i am running 27 psi on a green turbo, with all necessary supporting mods. I feel like im rambling but this is a HUGE subject, you can just simply tell someone what to do to "get" 400+ whp There are alot of things you have to have and do, probablly most importantly is tuning, because anyone can go buy and install parts

 

[ZSPTurbo]

wow, you know, now that I think about it, Im kindof suprised that stock pistons and rods (albeit from diffrent engines) can support 500 hp.

what is it about that combo that makes it so powerful?