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4 Valves per cylinder ?

4 Valves per cylinder ?

Author
Discussion

wadsapple

Original Poster:

2,773 posts

95 months

Friday 28th September 2012
quotequote all
I was at my engine builder,s workshop today picking up one of my race engines that they have been upgrading for me.I was nosing about as you do when in a workshop that has all sorts of goodies and saw that they have built a AJP V8 engine with four valves per cylinder.Has this been done before? Should i be thinking that this would be a good upgrade for my AJP engines ?





leerdam23

560 posts

169 months

Friday 28th September 2012
quotequote all
I'm sure it will fit in mine... doesn't look like a race block though.


wadsapple

Original Poster:

2,773 posts

95 months

Friday 28th September 2012
quotequote all
no it doesn't look like a race engine block they are like hens teeth ,probably for road use.i have a race AJP engine in a challenge car i might upgrade if the heads were a good option.i probably should have asked at the time.still what advantages would you have in a road engine ?

leerdam23

560 posts

169 months

Friday 28th September 2012
quotequote all
Dunno. 4.7 race engine with 4v, and a real screamer....

There was a race block going for grabs on ebay, but needs quite some work since no end caps etc... not sure if Dom has any more blocks?

Gazzab

16,843 posts

190 months

Friday 28th September 2012
quotequote all
Have heard of one before maybe the same one....
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bionicjim

473 posts

47 months

Friday 28th September 2012
quotequote all
That's one good looking set up
I recon that's good for 500 bhp at least

leerdam23

560 posts

169 months

Friday 28th September 2012
quotequote all
anyone spot what the heads are from.

spitfire4v8

2,238 posts

89 months

Friday 28th September 2012
quotequote all
Do you know what the heads are off? they don't look like they were designed for the AJP as we know it since nothing on the front end lines up judging from the pics? Have they found a V8 head set with the same bore spacing and trying to get those to fit I wonder? Interesting project and fascinating pics .. would love to know more ! Does anyone recognise the heads as being from another car?

Alexdaredevilz

5,681 posts

87 months

Friday 28th September 2012
quotequote all
I was thinking the same thing joolz

Just like the BMW bike engine head on the a-series mini engine

ChimpofDarkness

6,391 posts

87 months

Friday 28th September 2012
quotequote all
Audi?

scotty_d

6,784 posts

102 months

Saturday 29th September 2012
quotequote all
With heads that wide would it still fit inside a Cerbs engine bay? I bet it would be very tight.

steviejasp

1,525 posts

73 months

Saturday 29th September 2012
quotequote all
I seem to remember reading that the reason they didnt make the AJP8 a 4 valve engine was because it wouldnt fit in a Cerb.

dempsey

289 posts

118 months

Saturday 29th September 2012
quotequote all
steviejasp said:
I seem to remember reading that the reason they didnt make the AJP8 a 4 valve engine was because it wouldnt fit in a Cerb.
That was the reason given by Peter Wheeler in his video interview.

longbow

1,596 posts

143 months

Saturday 29th September 2012
quotequote all
Wow...... someone has virtually designed a complete new engine here. Could you not politely ask the builder for more info please..........

Edited by longbow on Saturday 29th September 11:56

ridds

7,333 posts

152 months

Saturday 29th September 2012
quotequote all
I missing something here but someone has placed 2 heads (of unknown origin, with casting dimension miss-match and too small a bore) on an AJP block and there's talk of 32V V8s...

From memory, Melling knocked up a CAD scheme and or machined the schemes in Ali but I don;t think one has ever run, has it?

And no, it won't fit in a Cerb unless you hack the chassis and body to bits. smile

Gazzab

16,843 posts

190 months

Saturday 29th September 2012
quotequote all
There is / was a 4 valve per cyl cerb up n running..

Alexdaredevilz

5,681 posts

87 months

Saturday 29th September 2012
quotequote all
More to the point, does it actually work?

Gazzab

16,843 posts

190 months

Saturday 29th September 2012
quotequote all
Apparently it does/did. 500bhp on a 4.5 apparently..

Mr Cerbera

3,866 posts

138 months

Saturday 29th September 2012
quotequote all
Gazzab said:
Apparently it does/did. 500bhp on a 4.5 apparently..
Ahem.... and 420 out of a Standard Engine.....
typenerdwobblenutsheadacherotatenonoroflgetmecoat

Gazzab

16,843 posts

190 months

Saturday 29th September 2012
quotequote all
Mr Cerbera said:
Gazzab said:
Apparently it does/did. 500bhp on a 4.5 apparently..
Ahem.... and 420 out of a Standard Engine.....
typenerdwobblenutsheadacherotatenonoroflgetmecoat
Don't understand... Yep 420 on a standard but mapped etc 4.5 but with 2 extra valves then a lot more apparently.