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

rb30det_

By rb30det_,
in Engines & Forced Induction

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rb30det_ Apprentice

rb30det_

Posted
Posted

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 Grand Master

KiwiRS4T

Posted
Posted

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_ Apprentice

rb30det_

Posted
  • Author
Posted

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

Shoota_77 Veteran

Shoota_77

Posted
Posted

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 Grand Master

KiwiRS4T

Posted
Posted

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 Grand Master

Ben C34

Posted
Posted

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_ Apprentice

rb30det_

Posted
  • Author
Posted

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 :wacko: Will post results when all together :bunny:

Shoota_77 Veteran

Shoota_77

Posted
Posted

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_ Apprentice

rb30det_

Posted
  • Author
Posted

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 :)

  • 10 months later...
  • 3 weeks later...
Nismo 3.2ish Grand Master

Nismo 3.2ish

Posted
Posted

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 :(

  • 2 years later...
rb30det_ Apprentice

rb30det_

Posted
  • Author
Posted

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

 

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