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#1 wassupcrew

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Posted 09 April 2019 - 09:22 PM

Hi all. I was wondering if anyone would know if this head would fit and work well on my 1275spi. It's a vmaxscart st3 head 36 and 30mm valves ported and polished with 19.5cc chambers. Just want to know if it would fit and work well before I invest in itAttached File  ad_1554844580780.jpg   48.42K   2 downloads

Edited by wassupcrew, 09 April 2019 - 09:24 PM.


#2 Steve220

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Posted 10 April 2019 - 07:42 AM

That's an MPi head, should work! However your thermostat housing will be at a different angle because of it.

#3 nicklouse

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Posted 10 April 2019 - 07:48 AM

why would it be at a different angle? all 1275 heads have the same thermostat hole orientation.

 

the only main difference is the casting holes or lack of. no temp take off as there is the mounting holes for the high mount alternator.



#4 Fast Ivan

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Posted 10 April 2019 - 08:10 AM

Hi all. I was wondering if anyone would know if this head would fit and work well on my 1275spi. It's a vmaxscart st3 head 36 and 30mm valves ported and polished with 19.5cc chambers. Just want to know if it would fit and work well before I invest in itattachicon.gif ad_1554844580780.jpg

 

The combustion chamber cc is low compared to a standard SPI so your compression ratio will be different, you would be advised to work this out before fitting



#5 wassupcrew

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Posted 10 April 2019 - 09:17 AM

What's the best way to work out the compression ratio?

#6 Quincy Sparks

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Posted 10 April 2019 - 09:43 AM

Worth dropping Stuart at Vmaxscart an email? He might have more info on the original specs of the head. https://www.vmaxscar...nder-head-work/



#7 Steve220

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Posted 10 April 2019 - 10:08 AM

Edited.

Edited by Steve220, 10 April 2019 - 12:26 PM.


#8 Steve220

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Posted 10 April 2019 - 10:11 AM

Edited

Edited by Steve220, 10 April 2019 - 12:27 PM.


#9 the.stroker

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Posted 10 April 2019 - 10:48 AM

I've moved this to a more appropriate sub forum.

 

A reminder for contributors, be mindful of the below statement............

 

Warning
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#10 nicklouse

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Posted 10 April 2019 - 10:51 AM

This should clarify it.

yep a 1275 and a 998 so there are bigger issues than the stat holes.



#11 nicklouse

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Posted 10 April 2019 - 10:52 AM

 

why would it be at a different angle? all 1275 heads have the same thermostat hole orientation.

the only main difference is the casting holes or lack of. no temp take off as there is the mounting holes for the high mount alternator.

No they don't. You try putting an MPi thermostat housing on any other cylinder head..

 

no problems I have. and it is fine. as long as it is a 1275.
27807FF2-775D-4D3D-842E-EAB1C117AA89_zps
E84CC788-DDB1-41FF-99C1-DB1A20996FD2_zps


Edited by nicklouse, 10 April 2019 - 11:44 AM.


#12 KTS

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Posted 10 April 2019 - 10:54 AM

What's the best way to work out the compression ratio?

 

 

..this way..

 

https://jscalc.io/ca...RNEglVkKLQir11T



#13 Steve220

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Posted 10 April 2019 - 12:21 PM

Interesting! Well I'm happily proven wrong!




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