MTI heads are in.....check out these pics
01-02-2005, 07:18 AM
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MTI heads are in.....check out these pics i just got my stage 2e heads in yesterday. i must say i am very impressed with the porting job. i do have one question though. the bowl part doesnt seem to be as smoothed out as the pictures on their website. i wanted to ask yall if this is something i should worry about.....what i mean is will it hurt performance?? here are some pics i took
01-02-2005, 07:48 AM
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The ones on their site are hand race polished, I believe. For the street unpolished head bowls are better for fuel combustion ( to do W/ atomisation & distribution.)
That spark plug bung area could be smoother though.(you could do that yourself with a grinder and a steady hand)
That spark plug bung area could be smoother though.(you could do that yourself with a grinder and a steady hand)
01-02-2005, 12:55 PM
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Originally Posted by PREDATOR-Z
What kinda cc are those 2E LS1's?
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01-02-2005, 08:18 PM
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I thought all of MTI's heads had a .030 mill from the shop. Did you ask them not to do it? Double check!! My 2E's have a .030 mill and the chambers are about 58cc's on a 5.3 head.
01-02-2005, 09:25 PM
#9
Originally Posted by Jabroni
I thought all of MTI's heads had a .030 mill from the shop. Did you ask them not to do it? Double check!! My 2E's have a .030 mill and the chambers are about 58cc's on a 5.3 head.
01-03-2005, 08:07 AM
#13
Originally Posted by LawmanSS
FWIW, when I ordered my Stage IIR LS6 heads, they told me that they will automatically mill .030 unless you specify otherwise.
01-03-2005, 08:13 AM
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Originally Posted by PREDATOR-Z
The ones on their site are hand race polished, I believe. For the street unpolished head bowls are better for fuel combustion ( to do W/ atomisation & distribution.)
That spark plug bung area could be smoother though.(you could do that yourself with a grinder and a steady hand)
That spark plug bung area could be smoother though.(you could do that yourself with a grinder and a steady hand)
Head bowls? The combustion chamber? Looks to me like the "Bowl" the area just before that valve in the port is worked.
As for the sparkplug bung why bother with it? It is placed there to help control mixture movement,removing it will lower your CR and you will gain no increase in power from everything I have seen.
Maybe I'm out of the loop now but I still have seen no good data on removing this.
01-03-2005, 08:22 AM
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yeah i dont think im gonna touch them....i trust mti knows what theyre doing. i just cleaned up the edges a lil bit with some light sandpaper. over all, they look great and i cant wait to get them on 
01-03-2005, 09:42 AM
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Originally Posted by The35thZ
yeah i dont think im gonna touch them....i trust mti knows what theyre doing. i just cleaned up the edges a lil bit with some light sandpaper. over all, they look great and i cant wait to get them on
It is a good idea to "break" all sharp edges with a light abrasive. This helps reduce the chances of hotspotting which can lead to pre-ignition or detonation.
Good luck with your new combo!
01-03-2005, 10:09 AM
#17
Originally Posted by SideStep
When I ordered, they (MTI) would absolutely NOT mill the heads, ANY! David told me they had too many problems with customers installing their milled heads and having PtoV issues...
01-03-2005, 05:38 PM
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With the trend moving towards larger camshafts and PTV becoming an ever increasing issue, we do not mill heads down anymore as a standard practice.
The gains that you see from milling are very minimal (approx 1.5% HP gain per point of compression) so if you milled a set of heads thirty thousandths, you'd gain 1/2 a point of compression which would equate to a gain of approx. 3 rwhp on a 400 rwhp car.
Best regards,
David Coates
MTI
Houston, TX
The gains that you see from milling are very minimal (approx 1.5% HP gain per point of compression) so if you milled a set of heads thirty thousandths, you'd gain 1/2 a point of compression which would equate to a gain of approx. 3 rwhp on a 400 rwhp car.
Best regards,
David Coates
MTI
Houston, TX
