Single Turbo RB26 Cam selection (tried searching)

[ctnewman]

Hey mates,

I tried searching on this, but after sifting through 75 threads about putting rb26 cams into RB25/RB20's I am at a loss...

Looking for a good cam profile for this setup:

Probably Would go with Tomei or Jun Cams

RB26

Single GT3040R

Wiseco Pistons (8.0 CR)

Pauter Rods

Tomei Valve springs and retainers (Type B or C)

Jun Main and Head Bolts

Jun Valve Guides

Looking to make alot of top end power. 700HP or so.

I was thinking about the tomei procams

270 duration X 10.25 Lift On Both the intake and exhaust.

From reading a few threads, I understand i will need to grind the head for cam clearance.

I also understand that i should be OKAY with piston clearance.

Summary of questions:

1) 270 x 10.25 lift ok?

2) Will I need Solid Lifters?

3) Type B or C valve Springs?

4) Does this require valve relief on the pistons?

[Sydneykid]

Hey mates,

I tried searching on this, but after sifting through 75 threads about putting rb26 cams into RB25/RB20's  I am at a loss...

Looking for a good cam profile for this setup:

Probably Would go with Tomei or Jun Cams

RB26

Single GT3040R

Wiseco Pistons (8.0 CR)

Pauter Rods

Tomei Valve springs and retainers (Type B or C)

Jun Main and Head Bolts

Jun Valve Guides

Looking to make alot of top end power.  700HP or so.

I was thinking about the tomei procams

270 duration X 10.25 Lift On Both the intake and exhaust.

From reading a few threads, I understand i will need to grind the head for cam clearance.

I also understand that i should be OKAY with piston clearance.

Summary of questions:

1)  270 x 10.25 lift ok?

2)  Will I need Solid Lifters?

3)  Type B or C valve Springs?

4)  Does this require valve relief on the pistons?

Suggestions to your questions follow;

1. Yep

2. Yes, you will need the complete RB26 valve train

3. Buy a cam kit, it's cheaper

4. No

I am using the Jun 68 (272/10.8m) inlet and 70 (280/10.8mm) exhaust, I chose them because of the higher lift. Jun specify 2 valve springs specs, one for up to 11mm lift (1009M-N001) and one for over 11 mm lift (1009M-N004). Jun also recommend using offset ratainers (0.5mm) for 10.8 mm lift, but I have not found it necessary as I have replaced the valve seats such that no offset is required.

The "grind the head" is nothing more than 10 seconds with the die grinder for each lobe.

Hope that is of some help:cheers:

[fatz]

sydney kid

what is the cost of cams and springs jun spec?

[Sydneykid]

sydney kid

what is the cost of cams and springs jun spec?

Not cheap, is the best answer I can give. I bought mine used, with some other Jun stuff and even then they weren't particularly cheap. I can only suggest you check around as the prices vary HEAPS.

[ctnewman]

Thank you for the info sydneykid. I was planning on buying the guides, lifters, retainers and springs, as well as OEM valves. I see that JUN makes a cam kit. Perhaps I will get that.