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vl, rb25, vg30 turbos

rbs13

By rbs13,
in Engines & Forced Induction

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rbs13 Community Regular

rbs13

Posted
Posted

hey guys, just wondering which turbo is bigger? vl turbos came out with steel wheels didnt they? if i was going to do the mod boostd done would the vl exhaust housing be better or is smaller? how is compared to the vg30? the vl one isnt ball bearing is it? sorry for all the questions just wondering which would be the better base for the upgrade.

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https://www.sau.com.au/forums/topic/42840-vl-rb25-vg30-turbos/
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Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

ive got a hybrid turbo allready made up for sale

Specs are

RX7 hitachi core and rear blade cropped (full steal)

Fully machined into a VG30 .71 AR rear housing

Fully rebuilt with new oversize bearings

T4 6.0 A/R front with waste gate actuator

Dump pipe to go with it. Turbo has done 2000k's and only had 10psi run through it.

0412 417 579 gemme a call

BOOSTD Mentor

BOOSTD

Posted
Posted

If you use another turbo with a steel turbine wheel, the increase in rotating mass will require a smaller exhaust outlet size for similar boost response. This will directly cause increased restriction and power loss. Would probably be a better option on a 3ltr however. as my turbo would almost certainly boost to early and surge due to increase capacity.

Also different A/R exhuast's will cause a change in spoolup time which will need to be compensated for at the turbine side.

Big can of worms... that why it is so much simpler to go with a proven setup. I had 7 goes at mine. HKS on the other hand.......well you get what you pay for.

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