Tomei 270 Procams 10.8Mm Lift, Whose Used Them On A 30Det

[rb30det_]

Hi guys

I need your help. I'm in the middle of my build and wanting to know if anyone has used Tomei procam 270 with 10.8mm lift in/ex on their rb26/30 build?

It's the full mac daddy build and going into my pro drift car.

Bottom end is JE pistons 8.2:1, nitto I beam rods, Ross balancer, tomei pump etc etc.

I need to know if these cams will be beneficial for drifting where I am chasing mid to top end power (on off throttle a lot) also need to know if they mite be to laggy?

I think you can also get 260duration cams with the same lift?.any better??

Thanks in advance!

[KiwiRS4T]

Will take a while to fill those cylinders - why did you go for such low compression?

[KiwiRS4T]

Will take a while to fill those cylinders - why did you go for such low compression?

Re the cams - have a read though the "what cams would you choose" thread below.

[rb30det_]

Will take a while to fill those cylinders - why did you go for such low compression?

I think you might know Joe Kyle? He said to stay with that standard compression ratio. I wanted more but he talked me down ? lol

[Ben C34]

What's 8.2 : 1 standard on ?

[KiwiRS4T]

RB30 (turbo?) I have the same - no money for forged internals at the time - would have preferred 9.5:1 or so!

What's 8.2 : 1 standard on ?

[WMDC35]

rb26 is 8.5? rb30et is 7?

[Ben C34]

Rb30et is 7.8 to1.

[rb30det_]

Oh right, sorry boys! haha.

So anyhow has anyone used these cams and can give an insight to the responsiveness please? on a RB30 not 26

[Shoota_77]

I would've thought too big. For a drift car you want instant snappy power. With such low comp and big sticks I think you'll struggle to achieve that unless you've got a small super responsive turbo which then defeats the purpose of the big cams cause you're not going to achieve massive top end anyway! With that comp you will be able to push big boost into it but that will only make it a slug until it hits boost then you'll have a huge top end which wouldn't suit drifting.

I would think Poncams would be a lot more suited if you even bother with cams at all.

If it's not too late I'd bump comp up to 9.5:1 and get a mid sized turbo (presume single?) so you've got an engine that makes power straight away then a turbo that comes in not too soon after.

What power are you chasing?

[KiwiRS4T]

Rb30et is 7.8 to1.

OK just looked up the RB30 PDF and that says RB30E is 8.2:1 and the RB30ET 7.1:1 (although the exact figure would depend on what twin cam head you were using) but whatever that's going back a few years - today you would want better than 9:1 or even more if using E85

[Ben C34]

OK just looked up the RB30 PDF and that says RB30E is 8.2:1 and the RB30ET 7.1:1 (although the exact figure would depend on what twin cam head you were using) but whatever that's going back a few years - today you would want better than 9:1 or even more if using E85

sorry I wasnt clear, that is with the sohc head it is 7.8:1 .

[rb30det_]

I would've thought too big. For a drift car you want instant snappy power. With such low comp and big sticks I think you'll struggle to achieve that unless you've got a small super responsive turbo which then defeats the purpose of the big cams cause you're not going to achieve massive top end anyway! With that comp you will be able to push big boost into it but that will only make it a slug until it hits boost then you'll have a huge top end which wouldn't suit drifting.

I would think Poncams would be a lot more suited if you even bother with cams at all.

If it's not too late I'd bump comp up to 9.5:1 and get a mid sized turbo (presume single?) so you've got an engine that makes power straight away then a turbo that comes in not too soon after.

What power are you chasing?

ok I've got some 260 10.25 inlet and 270 10.8mm ex, talked to a few tuners who suggested that duration. Also Ive got JE pistons so i think they only come in 8.2:1 or 9.1? Too late anyhow they've been ordered Will post results when all together

[rb30det_]

Also Ewan. I'll b chasing a lot after I tune it on e85 down the track. Say 800

[Shoota_77]

Too late then!

The lower comp should give you a huge top end when you chase it later on (with big boost) I just hope it does the job for you in the meantime.

Maybe you can just hold it at 6000 rpm minimum with some mad anti lag system and it'll be perfect!

[rb30det_]

Too late then!

The lower comp should give you a huge top end when you chase it later on (with big boost) I just hope it does the job for you in the meantime.

Maybe you can just hold it at 6000 rpm minimum with some mad anti lag system and it'll be perfect!

Yer thanks mate, I'll post up a video when it runs, let you be the judge

[Endless26/30]

How did the Cam choice go mate? what turbo etc were you running with that cam combo?

[chairman]

rb26/30 8.1 comp

tomie 260/270 10.25mm lift. yet to start

[Nismo 3.2ish]

Yer thanks mate, I'll post up a video when it runs, let you be the judge

what happened with the info/vids, everytime I get interested in something it just stops, I must be a JINKS

[rb30det_]

Old thread! Sorry boys been a while since I have been in the threads. For those wanting to know on results which may help them on their build etc etc

Car made 550Kw on e85 @ 21psi on A Holset Turbo.

Specs;

26Head (cams stated previously)

Nitto I Beam & JE Pistons

ID2000s with e85