Red Top Beams Piston Upgrade

Size, fit what ever your bores clean up at. If just a hone is required then stick with 86mm. If not the bore out the minimum to 86.5mm.

You will need custom pistons, std CR is 11:1, black top is a tad more.

Are you fitting an ecu also? If so then you could go to 12 or 13:1.

sticking with the standard ECU then you are best off leaving it with standard compression. From my experience stock ECU's don't like big upgrades in comp ratios. sure they can work, you just have to be willing to sacrifice timing and power so that your engine doesn't detonate itself.
 
on my old 4age I had upgraded to higher comp pistons on the stock ecu. I had to run a very easy tune on a set of cam gears and had to retard ignition timing to about 9deg BTDC on base time just to stop the engine smashing a ringland. So the differance in running the higher comp was a complete waste of time. and this was going from 9.4:1 to about 10.8:1

thanks for the info guys.
 
i had a think about it over lunch and am now deciding to go with the aftermarket ECU , if im building it up might aswell do it right from the beginning 

track_mr2
Why do you want to build a N/A track car?

Simplicity, Reliability, Lightweight, Personal Preference.
Plenty of reasons :)

My  Beams SW0 has no power steering and no ABS, so it weighs in at around 1120kg (according to the rego papers), which isn't exactly fat. In fact, with the 200BHP BEAMS Red Top, it has a better power-to-weight ratio than a standard Lotus Elise S... and because it doesn't have a turbo, there's no lag in the throttle response and no ugly 'power surprises' mid corner.
 
All that adds up to a good reason for Voodoo to do what he's doing in my books! 

Ahahah
Good work voodoo
Hope it's a redtop would have been my dream strip it :)
There's a guy with a 80 rwkw mr2 sw20 stock as
And he pulls 1.12.02 lap times at Wakefield
That's pretty bloody quick.

All depends pn who is driving it and numerous other factors.

I think the Na would be a great track car you can't go wrong like that in terms of reliabikty and ease to tune and work on :)

Gatesys SW20 
I think the Na would be a great track car you can't go wrong like that in terms of reliabikty and ease to tune and work on :)

I definately agree with the N/A being a good option for reliability and fun. Turbo's can give a lot of headaches and obviously require more maintenance. On the flip side though, I used to have a G-Limted MR2 around 6 or 7 years ago and it did blow an engine.
I went turbo for a track car this time becuase of the potential and the ease to increase power when you want to. That and it was cheap lol.