4.7Lt V8 oversize to a 5Lt

[NormanD]

I have a 4.7Lt V8 engine, stroked from the 4.3Lt

I've seen that you can increase the bore from 91mm to 93mm
So increasing the capacity to a 5Lt

Can this be done as a re-bore or new liners
Also any pit fulls in doing the same

[mikey k]

NormanD said:

I have a 4.7Lt V8 engine, stroked from the 4.3Lt

I've seen that you can increase the bore from 91mm to 93mm
So increasing the capacity to a 5Lt

Can this be done as a re-bore or new liners
Also any pit fulls in doing the same

It needs new liners AND the Aston way of fitting them is not reliable at that size
If you are seriously considering this you really need to talk to Bamford Rose as they have done it with two different techniques with my engine as the guinea pig

[NormanD]

Thanks for a quick responce

I'll give them a call in the next few days

[mikey k]

You're welcome
Probably better to email as I think Mike is in the US, mention you are looking at Johnny 550 spec

[NormanD]

mikey k said:

You're welcome
Probably better to email as I think Mike is in the US, mention you are looking at Johnny 550 spec

I have already fired an email
I'll mention you on my next email if thats OK then

[mikey k]

no problem

[Speculatore]

Hi Norman... How did your manual conversion end up with your XKR???

[NormanD]

Speculatore said:

Hi Norman... How did your manual conversion end up with your XKR???

That's all sorted, just looking to get more horses out of it hence trying to get 5Lts

Did try fitting the Jag 5Lt but wouldn't fit hence looking to play with the AM