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View Full Version : Forged rods and boost question



Dave86
Wednesday 2nd May 2012, 19:32
I will be getting a set of forged rods for my t5 engine and i know that bringing high boost in at low revs on standard rods bends them but how soon can i bring the boost in with forged ones?
and by high boost i mean around 1.5bar and as for early i mean around 2k revs

theflyingbrick
Wednesday 2nd May 2012, 19:34
sorry to say mate on forged rods you can only run 0.5 bar and you better leave it until 5900 rpm just to be on the safe side ;) i could be wrong but i doubt it :D

t5 pete
Wednesday 2nd May 2012, 19:37
sorry to say mate on forged rods you can only run 0.5 bar and you better leave it until 5900 rpm just to be on the safe side ;) i could be wrong but i doubt it :D

lol thats totally lost me.
With having forged rods you will be able to have a much more aggressive map bringing in the boost alot sooner

Dave86
Wednesday 2nd May 2012, 19:44
sorry to say mate on forged rods you can only run 0.5 bar and you better leave it until 5900 rpm just to be on the safe side ;) i could be wrong but i doubt it :D

oh dear that's no good i best abandon my project lol

mitchyboy01
Wednesday 2nd May 2012, 20:06
Bring in mega boost whenever you like, the joy of forged rods.

T5frankie
Wednesday 2nd May 2012, 20:26
lol thats totally lost me.
With having forged rods you will be able to have a much more aggressive map bringing in the boost alot sooner

it's called sarcasm pete lol

t5 pete
Wednesday 2nd May 2012, 20:38
Well its a good job weve got you frank to let me know

T5frankie
Wednesday 2nd May 2012, 20:40
Well its a good job weve got you frank to let me know

it's my job to point out the obvious pete you know that lol

t5 pete
Wednesday 2nd May 2012, 20:41
lol

theflyingbrick
Wednesday 2nd May 2012, 22:02
oh dear that's no good i best abandon my project lol

i would mate,like i said before its really not worth it!! not that im jealous or anything :cussing:

Dave86
Wednesday 2nd May 2012, 22:08
i would mate,like i said before its really not worth it!! not that im jealous or anything :cussing:

lol

Dave86
Wednesday 2nd May 2012, 22:11
Bring in mega boost whenever you like, the joy of forged rods.

Cheers that's just what i wanted to hear :)

glock19
Friday 4th May 2012, 02:27
Even with forged rods, you can't bring in the boost too early. There are other weakness in the crank shaft and pistons and if the rods don't get bent/break, any detonation (due to high boost, low rev) will destroy the crank. Most engines (Volvo, Subaru, Evo, etc) have a tendency to knock at the 2800~3600 region and this is where the boost have to be kept in check or you can lower the ignition timing instead.

smithy
Friday 4th May 2012, 16:42
Even with forged rods, you can't bring in the boost too early. There are other weakness in the crank shaft and pistons and if the rods don't get bent/break, any detonation (due to high boost, low rev) will destroy the crank. Most engines (Volvo, Subaru, Evo, etc) have a tendency to knock at the 2800~3600 region and this is where the boost have to be kept in check or you can lower the ignition timing instead.

you wont bend a redblock crank lol

Kingsford G
Friday 4th May 2012, 16:52
you wont bend a redblock crank lol

Didn`t know that.So u bringing yr 940 to essex meet?

t5 pete
Friday 4th May 2012, 16:55
you wont bend a redblock crank lol


That only because the car will take 20+ years to be finished lol
couldnt resist

Dangerous Dave
Friday 4th May 2012, 17:34
Did someone say Redblock?

mitchyboy01
Friday 4th May 2012, 17:51
Even with forged rods, you can't bring in the boost too early. There are other weakness in the crank shaft and pistons and if the rods don't get bent/break, any detonation (due to high boost, low rev) will destroy the crank. Most engines (Volvo, Subaru, Evo, etc) have a tendency to knock at the 2800~3600 region and this is where the boost have to be kept in check or you can lower the ignition timing instead.

Yes, so basically if it's mapped correctly you can have as much boost as you like as low down as you like.

oblark
Friday 4th May 2012, 18:38
If the compression ratio is lowered then can high boost pressures be run ?

Rob

smithy
Saturday 5th May 2012, 10:48
If the compression ratio is lowered then can high boost pressures be run ?

Rob

i have 7.8 crompression ratio lol

smithy
Saturday 5th May 2012, 10:49
Did someone say Redblock?

yes mate but you dont need to worry about boost lol.

smithy
Saturday 5th May 2012, 10:51
Didn`t know that.So u bringing yr 940 to essex meet?

the car wont be finished for the next meet mate but i will make one very soon though welcome to morgage payments stopping me from getting the car finished

Dangerous Dave
Saturday 5th May 2012, 13:19
yes mate but you dont need to worry about boost lol.
I'm all sad now :(

Cheeky git LOL