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Home > Help Needed / General Tech Chat > what spec would you reccomend for a fast n/a road engine?

minimole23

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Wiltshire

22nd Mar, 2008 at 04:00:21pm

so far my thoughts are as follows.

Benross head
Std turbo pistons flushed with block face
balanced bottom end
light flywheel
possibly a weber 45 dcoe
276 or 286 cam
1.5:1 roller tip rockers
10.5:1 compression ratio
Oh yes, and megajolt.

I cant decide on whether to stick with the 3.4 final drive or go for a 3.2

How does this sound as a starting point? I'm looking for about 90 or more banannas. My main areas of headache are cam choise and final drive.

Edited by minimole23 on 22nd Mar, 2008.

On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding

Bat

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Bermingum

22nd Mar, 2008 at 04:11:23pm

Hi,
I wouldn't bother with a 45 on anything less than a 1380 and then only if you really want to.
286 cam will loose bottom end torque and mpg, you can pull the torque up with MJ. Rocker ratio will depend on cam choice.
I'm running a 2.9 FD on my 1380, pulls well doesn't rev its nuts off on the motorway :)
Cheers,
Gavin :)

Edited by Bat on 22nd Mar, 2008.

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theoneeyedlizard

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The Boom Boom speaker Police!

Essex

22nd Mar, 2008 at 04:41:14pm

I still think that you should go for a turbo IMHO.

With that sort of spec you will struggle to make 90bhp. A standard intercooled turbo will easily make 110bhp.



In the 13's at last!.. Just

AlexB
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6295 Posts
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The boring bloke who runs this place.

Berkshire

22nd Mar, 2008 at 04:55:35pm

Don't forget how much extra torque you get with a turbo - that makes a huge difference in road-driving.


theoneeyedlizard

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The Boom Boom speaker Police!

Essex

22nd Mar, 2008 at 04:58:22pm

And the scope to further increase performance.

In the 13's at last!.. Just

Jordan

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1913 Posts
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Pointless Post Whore

Liverpool, North west

22nd Mar, 2008 at 05:13:45pm

Possible insurance problems?
I feel your pain. *tongue*

Back once again like a renegade master

BENROSS

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9812 Posts
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Resident Cylinder Head Modifier

Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

22nd Mar, 2008 at 05:34:48pm

yes go turbo, once its done its done
will more than give you a large grin every time you put your foot down






Alex1340

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Loughborough

22nd Mar, 2008 at 06:07:27pm

I wish i had gone turbo with mine before i chucked loads of cash in to a 1380 N/A and i would really have to start afresh to go with a turbo now and i can't aford it again. Go turbo, nothing else like it to drive, even a std metro turbo lump in there. SOOOO much cheaper as well if you don't go crazy on spec.

fab

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1497 Posts
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Parisien Turbo Expert

Paris\' suburb

22nd Mar, 2008 at 07:46:06pm

turbo,
cheaper , more power, every pull put a smile on your face!

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