Cam Gear & Dyno Tuning Results @ Croydon Racing Development

[Mik]

Hi guys,

These chinese whispers are true...

I was always expecting that I will need to attend to the 'weak point' of the car but no sooner than 6 months (I was hoping this anyway)

Cause? could be a no. of things:

- bad batch of fuel

- overheating due to lack of capacity of standard radiator

- blocked injector

etc....

I was quite lucky to catch this out in its infancy, the compression dropped in cylinder 6 down to 79, othe 5 cylinders were reading a consistant 140+.

As the engine is undergoing a total recondition with forged pistons, billet con rods, honing of cylinder bores, crank balance etc...my mechanic will be testing the other items for malfunction.

I can't wait to have it run-in once again

Marko.

<{POST_SNAPBACK}>

Ouch...was it pinging?

[BU5TER]

sounds like ringland damage?

[Mik]

sounds like ringland damage?

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Probably...but it could have done a valve

[Beer Baron]

that sucks mate. oh well, bigger and better

[Marko R1]

I have been advised ringland damage.

It was breathing extremely heavy via the catch can.

I am more than happy to build the bottom end that way I can rest easy & not worry about it when i blast it!

What is the general consensus on these options considering the power I am running:

- standard rods with arp bolts

- forged rods

- billet rods

i guess if i do want to run race fuel i will need aftermarket rods, if i keep it on the street though with over 350awkw standard will be ok, thoughts???

[Guest DIRTgarage]

I have been advised ringland damage.

It was breathing extremely heavy via the catch can.

I am more than happy to build the bottom end that way I can rest easy & not worry about it when i blast it!

What is the general consensus on these options considering the power I am running:

- standard rods with arp bolts

- forged rods

- billet rods

i guess if i do want to run race fuel i will need aftermarket rods, if i keep it on the street though with over 350awkw standard will be ok, thoughts???

<{POST_SNAPBACK}>

We run fully prepped stock rods in our car i.e. cryo treated, shot peened, closed and honed , ARP bolts etc. Rev the car to 9 grand and the engine has not missed a beat in 18 months. But.......if i had my time over and could see the sort of development stage the car is at now i would go aftermarket....no longer just a road car....but back then it was. Whats your crystal ball telling you?

[Marko R1]

Hi Paul & Stace,

for the moment my car will be street driven with the vision of 'maybe' running it on race fuel (only once or twice) just to see what it is capable of...other than that it will be guzzling pump fuel!

We run fully prepped stock rods in our car i.e. cryo treated, shot peened, closed and honed , ARP bolts etc. Rev the car to 9 grand and the engine has not missed a beat in 18 months. But.......if i had my time over and could see the sort of development stage the car is at now i would go aftermarket....no longer just a road car....but back then it was. Whats your crystal ball telling you?

<{POST_SNAPBACK}>

[Blitz]

Marko, as per my pm, I am going to be using standard RB26 conrods, prepared as per Pauls post above, with Tomei Rod bolts.

[blk180]

Im using PAR rods if i had my time over would have spendt that money on over parts

[Demon]

Marko, can I ask where you're getting the motor rebuilt?

[Marko R1]

dart automotive is rebuilding it for me.

nick, dart has sourced for me arp rod bolts

car will be ready this fri

Marko, can I ask where you're getting the motor rebuilt?

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[Blitz]

dart automotive is rebuilding it for me.

nick, dart has sourced for me arp rod bolts

car will be ready this fri

Marko, thanks for that, I will give Jim a call about them

[Marko R1]

Marko, thanks for that, I will give Jim a call about them

<{POST_SNAPBACK}>

Nick,

Have u dropped ur car off with dart as yet?

I now have 300km on the clock - another 1200km before I can boost it again for REAL power

Marko.

[Guest DIRTgarage]

Nick,

Have u dropped ur car off with dart as yet?

I now have 300km on the clock - another 1200km before I can boost it again for REAL power

Marko.

<{POST_SNAPBACK}>

good to hear she's back on the road Marko....what rods did ya end up using?

[williamsf1]

G'day Marko

good to hear it is all back in 1 peice, for interest sake I did a power run at DART yesterday....

I have an overlay of the torque curves too

and to all reading, I was on 19 psi and I think marko was on 13 psi.... so peak isnt really a factor but I made 585NM

interesting to see where the RS Vs SS come on etc..

hope to see you soon, before I split to Adelaide...

Im the green line....

[lwells]

Im using PAR rods if i had my time over would have spendt that money on over parts

<{POST_SNAPBACK}>

I assume you mean other parts? Why is that? Build too mild to justify the aftermarket jobbies?

[Blitz]

Nick,

Have u dropped ur car off with dart as yet?

I now have 300km on the clock - another 1200km before I can boost it again for REAL power

Marko.

Hopefully within a week or so Marko - All ready to go now.

[Marko R1]

G'day Marko

good to hear it is all back in 1 peice, for interest sake I did a power run at DART yesterday....

I have an overlay of the torque curves too

and to all reading, I was on 19 psi and I think marko was on 13 psi.... so peak isnt really a factor but I made 585NM

interesting to see where the RS Vs SS come on etc..

hope to see you soon, before I split to Adelaide...

Im the green line....

<{POST_SNAPBACK}>

thats a great result, mine on that run was around 12.8psi

when i was running 23psi it was just short of 800nm of torque - this running in period really sucks...

[williamsf1]

MARKO!!!

can't wait to see what it makes at DART when you have the 23 psi again!!!!

that dyno room is the business!!!

Edited September 9, 2005 by williamsf1

[Marko R1]

can't wait to see what it makes at DART when you have the 23 psi again!!!!

that dyno room is the business!!!

<{POST_SNAPBACK}>

for sure - that setup is state of the art!