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Old 11-01-2020, 07:26 PM   #1
blckholehurican
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Default Longblock: IAG 600 VS 700 Gains

The IAG 600 and 700 heads are identical except the 700 uses oversized valves +1mm.

With both being the same, with the same turbo/settings, how much more power would the 700 make due to these valves? Please ball park away.
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Old 11-02-2020, 10:19 AM   #2
cboggess
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What's the rest of the setup?
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Old 11-02-2020, 12:29 PM   #3
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Quote:
Originally Posted by blckholehurican View Post
The IAG 600 and 700 heads are identical except the 700 uses oversized valves +1mm.

With both being the same, with the same turbo/settings, how much more power would the 700 make due to these valves? Please ball park away.
27 more HP
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Old 11-02-2020, 12:55 PM   #4
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27 more HP
FB says 32hp.
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Old 11-02-2020, 01:14 PM   #5
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FB says 32hp.
let's just settle on 29.5 in that case
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Old 11-02-2020, 05:02 PM   #6
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Quote:
Originally Posted by blckholehurican View Post
The IAG 600 and 700 heads are identical except the 700 uses oversized valves +1mm.

With both being the same, with the same turbo/settings, how much more power would the 700 make due to these valves? Please ball park away.

What are your goals? And have you called IAG?
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Old 11-02-2020, 06:25 PM   #7
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Hmmm, is the head holding ur setup back? If yes then they are worth a lot, of not then not much. It would make a lil more power on a lil less boost and egt might be a touch less
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Old 11-02-2020, 06:53 PM   #8
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What are your goals? And have you called IAG?
I already ordered the 600 and will be running a meth fp red htz 8cm ported turbo with Tial MVI internal 18psi wastegate + full bolt ons. The 700 heads are only $300 more and im wondering if I upgraded to the +1mm valves if this would push beyond the stage 2 tuff block and apr2000 headstuds capability. Im planning on pushing this set up basically as hard it will go. Hoping for 600 crank /500whp.
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Old 11-02-2020, 07:01 PM   #9
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Hmmm, is the head holding ur setup back? If yes then they are worth a lot, of not then not much. It would make a lil more power on a lil less boost and egt might be a touch less
My current set up cobb20g + meth and full bolt ons have left me with a leak from the exhaust valves. I havent had the block apart to see for sure but the shop was fairly confident that the exhaust valves on my cylinder 2 were destroyed. The egt lowering is something I am obviously interested in and am basically wondering if I should at minimum get the super alloy exhaust valves over the standard, or if the standard should be fine?
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Old 11-02-2020, 07:01 PM   #10
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Turbine housing will hold it back before the valve size I’d think
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Old 11-02-2020, 07:02 PM   #11
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Quote:
Originally Posted by benflynn View Post
Hmmm, is the head holding ur setup back? If yes then they are worth a lot, of not then not much. It would make a lil more power on a lil less boost and egt might be a touch less
My current set up cobb20g + meth and full bolt ons have left me with a leak from the exhaust valves on my oem engine. I havent had the block apart to see for sure but the shop was fairly confident that the exhaust valves on my cylinder 2 were destroyed. The egt lowering is something I am obviously interested in and am basically wondering if I should at minimum get the super alloy exhaust valves over the standard, or if the standard should be fine?
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Old 11-02-2020, 07:05 PM   #12
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What's the rest of the setup?
rest of the setup is full bolt ons with meth and a fp red htz 8cm ported turbo.
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Old 11-02-2020, 07:06 PM   #13
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Is Cobb 20g a td05 or 6? That red should be a 06h if I recall, that should lower egt if going from 5-6. Also the valve seat surface being correct goes far to pull the heat out of the valve.
As far as material goes I don’t know, I have gone from sodium filled to a good stainless with no bad effects but in a diff tho boosted platform.
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Old 11-02-2020, 07:06 PM   #14
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Turbine housing will hold it back before the valve size I’d think
Thank you kindly sir.
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Old 11-02-2020, 07:12 PM   #15
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Quote:
Originally Posted by benflynn View Post
Is Cobb 20g a td05 or 6? That red should be a 06h if I recall, that should lower egt if going from 5-6. Also the valve seat surface being correct goes far to pull the heat out of the valve.
As far as material goes I don’t know, I have gone from sodium filled to a good stainless with no bad effects but in a diff tho boosted platform.
The cobb is a td05 and 42lbs/min. The only td06 i am aware of is the tomioka td06 20g which is rated at 500. The fp red is a 35r based, revamped in 2018 for better spool and is a 650hp- 65lbs/min (using blouch's hp to lbs scale).
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Old 11-02-2020, 07:17 PM   #16
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the fp red was atleast a gt35r based, I dont know if it still is or not after the redesign but its still 65lbs/min.
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Old 11-03-2020, 04:53 PM   #17
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It depends on a lot of things in the set up. If the heads aren't your major restriction in the engine, then they won't net you much.
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