Thread: Sr16 90mm bore, much benefit?

That engine is a freak, I just can't believe the power and 1/4 mile numbers you're doing with the 86mm crank, I'd say to get a 92mm crank and spray just a lil bit, welcome 10's

True was thinking more and would be silly to get 1.8 and then strip to got 2.2 later.

If all goes well should make a start at it sooner than expected. Wont be finished for ages though but Rome wasnt built in a day lol.

Is there any negatives to running a 90mm bore?

Running a 90mm require to sleeve the block, the most a block without sleeves handle is 88mm

I'd say to bore to 88mm and get some 12.5:1 CR pistons get a 92mm crank and you're at 2238cc but you will need some money.

Would it not be better to stick with a 86mm crank for a better the rod stroke ratio for high revs and sleeve it and bore to 90mm?

i have a set of brand new 12.5:1 compression 90mm cp pistons for sale pm me if you figure out what route you decide to go

I would say yes to that question except I would go 92 from the start.

Do it once, do it properly dude.

I have a sr16 sitting in my garage which will be receiving a 86mm SR crank and 90mm pistons (obviously sleeved first). I chose to go 90mm as I was concerned that going 92mm would not leave me with an engine with alot of potential for longevity.

Head your own advice. If the block and machine work are done properly 92mm will be fine.

Stratton.

Haha, touche. That being said, I'd prefer to err on the side of caution, there's also cost benefits to picking an off the shelf piston etc. (I wrote myself up a list of pros and cons, and decided against it in my own personal case)

Ive done 90mm engines....and to be honest - that would be limit on a race setup. Longevity goes out the window on the 92mm very quickly. UNless you have a brnad new block - i wouldnt be considering 92mm.

Everyone argues 92mm is awesome and everyone is running it. Lets see how these engines last a season.