Which engine?

[Graham]

Hi all,

I am nearing the point where I am going to order my shiny new engine. I have decided to go for a 331, which seems well suited for the road. My question is this...

Are there any requirements in terms of age, or spec that I must comply with for IVA. Is there a preferred age of block I should go for etc etc...

Thanks for you help :2thumbsup::2thumbsup::2thumbsup:

Graham.<!-- google_ad_section_end -->

P.S Randy, I have moved this here because it may be more relevant? Oh,and thanks for your info yesterday!

 

[Ian Anderson]

The older the better

A 1960's block will mean only needing to pass visual smoke test for IVA and MOT time

Once forward of about mid 1970's you will need to start being better than XXX emissions

Then from about 1990 you will need fuel injection and probably cats too


see
http://www.completekitcar.co.uk/Resources/M1 Inspection Manual May 09.pdf

Around page 36
Ian

 

[Mike Huddart]

Pre '75 is smoke test only, pre '93 ( Aug '92 ) for regular emission test, anything after that is cats.
Mike

 

[Graham]

Thanks guys,

Moocho appreciated :thumbsup:

Graham.

 

[Jac Mac]

Graham, I remember from your other threads re engine choice & want to chuck in one other suggestion... 351Windsor.. these started production in 1969.. therefore you might be able to find a rebuildable one in the pre 1975 group to make your IVA easier... when rebuilding look into using aftermart 6.200" length rods( Scat or Eagle) & 289/302 Compression height ( 1.600") pistons, with about 0.025" machined off the block deck. The factory cast crank with 3.00" mains & 2.310" rod jounal dias is a tough piece in its own right. That will give you a neat 351 cu in on a solid foundation for more compression etc @ a later date if you need it... just another recipe to chuck in the mix... only downsides are a bit of extra weight & the taller block will require headers for that dimension

 

[Mike Huddart]

Graham, I remember from your other threads re engine choice & want to chuck in one other suggestion... 351Windsor.. these started production in 1969.. therefore you might be able to find a rebuildable one in the pre 1975 group to make your IVA easier... when rebuilding look into using aftermart 6.200" length rods( Scat or Eagle) & 289/302 Compression height ( 1.600") pistons, with about 0.025" machined off the block deck. The factory cast crank with 3.00" mains & 2.310" rod jounal dias is a tough piece in its own right. That will give you a neat 351 cu in on a solid foundation for more compression etc @ a later date if you need it... just another recipe to chuck in the mix... only downsides are a bit of extra weight & the taller block will require headers for that dimension

Jac,
having a bit of a problem getting my head 'round this, by my calculation if you use 6.200" rods with stock 289/ 302 pistons @ 1.600" C/H, the pistons would stick out of the top of the block by about an eigth of an inch.
Would it not be easier and cheaper just to put the stock '70 4 BBL 351 flat top pistons in to get more compression.
Mike

 

[Jac Mac]

Jac,
having a bit of a problem getting my head 'round this, by my calculation if you use 6.200" rods with stock 289/ 302 pistons @ 1.600" C/H, the pistons would stick out of the top of the block by about an eigth of an inch.
Would it not be easier and cheaper just to put the stock '70 4 BBL 351 flat top pistons in to get more compression.
Mike

Oop's , yes looks like I had a senior moment while doing that mental calc last night.. 1.75O" + 6.200" + 1.600" = 9.550" which would mean either 0.070" off the piston for early 9.480" blocks or 0.050" in the 9.500" version.

However using 350 chev piston with 1.560" compression height will work with either 0.010 or 0.030 off the top along with valce pocket machine if reqd & when I think about it most of the aftermart rods like the 6.200" etc come with the 0.927" pin size

However , this might all be getting outside Graeme & or his engine man to get there head around.

My Apologies if I have added further confusion to you here Mike & Graeme..

 

[Graham]

Jac Mac,

I thought about this route, but discarded it, as I have the headers for a 302 block already.
However, thanks Jac and Mike for adding to the possibilities!

Graham.