What's the maximum Reliable RPM Limit on the 4G63 Head

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Apr 28, 2008 | 09:05 PM

#16

PlanoEvo

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From: My House

Don't worry...bout a ting....cause every little ting gonna be ahright

Apr 29, 2008 | 02:00 AM

#17

JC evo1

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what the hell?
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Apr 29, 2008 | 06:00 AM

#18

marck_c

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It's an Evo 3 with a fiberglass body kit (2 door conversion with fender flares). 600whp.

Apr 29, 2008 | 07:20 AM

#19

kduncan01

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Quote:

Originally Posted by marck_c

It's an Evo 3 with a fiberglass body kit (2 door conversion with fender flares). 600whp.

DAM, should make for one hell of a ride!!!! What the minimum weight in the class that it runs in?

Thanks for posting the pictures, its great to see what others have created

I havn't seen Dover in about 18 years

Please check into the lifters, it the only weak link I could think of with your head. I would hate to hear something happened, sounds like you have a fun racecar.

keep use updated

Duncan

Apr 29, 2008 | 12:28 PM

#20

wreckleford

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From: Jamaica

Quote:

Originally Posted by marck_c

The 4G61T came in the late eighties Mitsubishi Mirage. It is a 1595cc version of the 4G63T. The block is identical to the 63. The big differences being the deck height is shaves 6mm. In addition the stroke is 75.5mm as opposed to the 63's 88mm. The bore is 82.5mm stock. This yeilds a far superior rod ratio to the 63. The rods and cylinder head are interchangeble with the 63.

My setup:

Custom 83.5mm 10.0:1 Ross Pistons
Carillo Rods w/ ARP Fastners
ARP Head Studs, Mains, etc
MLS Head Gasket
Brian Crower Stage 3 Cams
Ferrea Dual Interferance fit Springs, w/Ti Retainers
Adjustable Gears
DNPerformance Tubular Header
FP3052 Turbocharger
Ferrea 1mm OS Valves
Extrude Honed Stock Intake Manifold
Ported and Polished 1g Head
Fluidampr Harmonic Balancer
Custom Moroso 3-Stage Dry Sump Kit
Evolution 8 Intercooler
Haltech E6X ECU

Is this going into your Evo 1?

Apr 29, 2008 | 04:24 PM

#21

marck_c

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From: kingston, jamaica

Apr 30, 2008 | 12:25 AM

#22

chuntington101

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mark c, how much power are these 1.6ltr engine making?? is there any reason you want to stick with the 1.6 as oppoised to streching out to 2.0 or even 2.4ltr??

aslo what cars can you find these engines in??

Cheers

Chris.

PS the jamaican rally is amazing! i will go there oneday!

May 1, 2008 | 09:43 AM

#23

kiggly

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From: Michigan

I've taken high speed video on OEM hydraulic lifters to almost 13k with no problems. I didn't take it higher than this, but I don't think the lifters would have any problems at all until the valvetrain went into float.

Depending on the cam profile and valve accelerations, rocker tips start getting angry and wearing badly by 11k.

Kevin

May 1, 2008 | 12:50 PM

#24

marck_c

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From: kingston, jamaica

Quote:

I'll know in a few weeks. The stock motors put out 153hp as compared to the 4g63's 200hp. There are people who have made 400whp with them. The reason for the smaller motor is the minimum class weight is dictated by the engine size. I.E. there is a a 450lb weight brake with the smaller motor. They came originally in the Mirage Turbo.

Quote:

Thanks for the heads up Kiggly