4.2 to 4.5 spec

[gcpeters]

Hello

im currently going to get my cerb (4.2) totally rebuilt and ive decided to go to a 4.5 but with the 4.2 induction - gas flowed and polished heads, remap etc etc

does anyone have any experince of a 4.5 but with 4.2 induction? any figures etc??

i have been told that the engine would be a 400+ bhp model

views?!

GP

[trackcar]

with some head work over 400hp is certainly on the cards

[thegreengoblet]

I believe JonnyW's race Cerb is a 4.5 with a 4.2 induction, and that makes 400+bhp.

[IanMack]

[quote=trackcar]with some head work over 400hp is certainly on the cards[/quote

Oooooooohhhh Excellent all the money iam investing wont be wasted then!! Cheers Joolz

[GTOBEN]

My cerb was a 4.2 but was increased to a 4.5 by the previous owner. According to track car solutions its running 402bhp.
I have a file full of the tickets from the work that was carried out, so pm me if you need any info.

[gcpeters]

woo hoo!!!

this is the news i was hoping to hear

im off to tvr power tomorrow to have a chat with dom and to check the place out, ive never been before so wanted to see before i drop my baby off!

Grant

[TT Tim]

thegreengoblet said:

I believe JonnyW's race Cerb is a 4.5 with a 4.2 induction, and that makes 400+bhp.

...399bhp according to John's last post.

Tim

[touching cloth]

TT Tim said:

thegreengoblet said:

I believe JonnyW's race Cerb is a 4.5 with a 4.2 induction, and that makes 400+bhp.

...399bhp according to John's last post.

Tim

400 torques to back that up though

[TT Tim]

I wasn't saying that was low, but the weight and power figures were PERFECT. Not worth John going over 400 as it would move him up a class from what I understand.

Andy does build 'nice' engines.

Tim

[touching cloth]

He does

I'm actually looking forward to the day when my engine gives me a good enough reason for a rebuild

[HarryW]

touching cloth said:

TT Tim said:

thegreengoblet said:

I believe JonnyW's race Cerb is a 4.5 with a 4.2 induction, and that makes 400+bhp.

...399bhp according to John's last post.

Tim

400 torques to back that up though

That's the really important bit to me, not seen a graph but almost certainly with 90% of it available between 2.5K-7K rpm. All backed up by a crisp throttle response of the 4.2 .

[touching cloth]

What was your Harry, 435? Albeit with a bit more internal trickery if I remember, altered compression ratios and the like.

[RUSSELLM]

gcpeters said:

im off to tvr power tomorrow to have a chat with dom and to check the place out, ive never been before so wanted to see before i drop my baby off!

Grant

Feel free to set fire to mine while you're there.

One's having the engine rebuilt & the other's just been carted off on the back of an AA wagon with a knackered clutch

[gcpeters]

RUSSELLM said:

gcpeters said:

im off to tvr power tomorrow to have a chat with dom and to check the place out, ive never been before so wanted to see before i drop my baby off!

Grant

Feel free to set fire to mine while you're there.

One's having the engine rebuilt & the other's just been carted off on the back of an AA wagon with a knackered clutch

oh not thats not so good!! hopefully my cerby will be up there soon to keep them company if all goes well!!

Grant

[gcpeters]

well i went up there, spoke to dom and im booked in for the 27th of May

great place, very impressed with the people/ facilities

cant wait!!

Grant

ps saw some of your cerbys up there as well !

[thegreengoblet]

touching cloth said:

He does

I'm actually looking forward to the day when my engine gives me a good enough reason for a rebuild

Although he is a Grumpy little one first thing in the morning!

[Thought I'd better Edit that....]

... when my car goes up to him first thing.

Edited by thegreengoblet on Monday 21st April 09:30

[FarmyardPants]

RUSSELLM said:

gcpeters said:

im off to tvr power tomorrow to have a chat with dom and to check the place out, ive never been before so wanted to see before i drop my baby off!

Grant

Feel free to set fire to mine while you're there.

One's having the engine rebuilt & the other's just been carted off on the back of an AA wagon with a knackered clutch

Bummer Russ. I take it the reason for the lacklustre performance turned out to be a lack of compression? At least it'll come back better than ever.

[RUSSELLM]

No.... The one i've been moaning about is the 4.5, it was badly mapped & was putting out 333-343.. Still managed 145mph at FT though

It's been mapped now to 377..... Still prefer my old 4.2 though. That's having some 4.5 bits fitted aswell, that old car's very light & rattly.. And it's more of an experience driving it

[SimonKD]

So what's the latest on "Old Bluey" then Russ?

Regards
Simon

[RUSSELLM]

I think it's ready to go back together now, they're waiting on me to get the covers back to them. The guy polishing the inlets has had them two weeks, I've told him I'm going round to collect them tomorrow.....whether he's finished them or not.