My XE nova on throttle bodies (Project 275+bhp)

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Originally Posted by philip

not bad then, but def have a rethink on the cam front as really you dont need to go any higher than 9k rpm or even 8.5k imho you'll be having to rebuild it every 12months easily and replace half the parts too. ill have a chat with martin bowyer if you'd like and see what he suggests cam wise that would see you around the 270+ bracket, but i know his answer would be go for more grunt than peak. dont forget the kitcars sbd tends to test their engines in are alot lighter than a nova or corsa etc so even less strain on everything.

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I would say that it will need rebuilding more often if its used properly!

And agreed - deffo no point in chasing figures - 275 sounds impressive, but I would bet that you give up and go for a much usable figure that means you arent clenching your buttocks when you pass 9k rpm....

Also I would rethink the F28 - with that kind of spec I would go with a Sccr at least.

In terms of the pistons, I too was told not to use pot-type pistons if it spends much time over 8k - slipper are significantly lighter and more at home at that rev range...

Finally - I would get some 'proper' injectors - Bosch greens (404s I aassume?) are a bit old school - you need some high-flowing Picos at least imo.

Tbh will I did think about the box choice and as I want a all round car then a cr box maybe stronger but not brilliant top end. And if a f28 can hold it's own in 600bhp+ c20lets I should be fine. As for the pistons if most companys can run them at 270 them I'll suck it and see. If I wanted safe easy options then I would stick with the cams I have now mate

what cams have you got now matey? no-ones knocking the build at all matey, but from experiance, number chasing is expensive & reliability and rebuilds are dear and a genuine 250bhp in a nova or corsa would be more than suitable. ive seen rally cars with big powered xes being hammered buy the 'milder' 230-250bhp cars as the power comes in alot low in the rpm range. + in all honesty i wouldnt trust the autosprint crank to nearly 10k, but thats just me.

Will - 803s were the old cossie injectors, pico 600cc or similar ftw, most xes ive seen with big power tend to run cp and omegas compared to wossners, as people found the wossners were abit heavy compared.

Scrap the F28, you will be replacing them all the time as they don't like high rpm.

Its a atmo engine, looking for top end is totally the wrong way to look at it and even if you use a Quaife sc box you can use a suitable fd which at those revs will comfortably gear it to over 150mph where as the F28 is possibly more like 200mph at those revs.

Think carefully about the spec, its not what I would be putting in a engine I would be expecting that power from and I am sure many would agree.

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Originally Posted by philip

what cams have you got now matey? no-ones knocking the build at all matey, but from experiance, number chasing is expensive & reliability and rebuilds are dear and a genuine 250bhp in a nova or corsa would be more than suitable. ive seen rally cars with big powered xes being hammered buy the 'milder' 230-250bhp cars as the power comes in alot low in the rpm range. + in all honesty i wouldnt trust the autosprint crank to nearly 10k, but thats just me.

Will - 803s were the old cossie injectors, pico 600cc or similar ftw, most xes ive seen with big power tend to run cp and omegas compared to wossners, as people found the wossners were abit heavy compared.

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I dont think for a second thats people are knocking the build mate as its each to there opinoin, and quite frankly I dont care lol.
Im using kent 1623 cams at present which I have seen 263bhp from. And as for the "crank" everyone you speak to in the tuning game will say that the other tuner's parts or tuning methods are rubbish for instance I could ask QED, SBD or even swindon what they think about the tuning guys you recommend and if they say he's crap then who do I beleive?
As for the build cost the engine bill is at 6k at present :cry: :cry:

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Originally Posted by Jonlem

Scrap the F28, you will be replacing them all the time as they don't like high rpm.

Its a atmo engine, looking for top end is totally the wrong way to look at it and even if you use a Quaife sc box you can use a suitable fd which at those revs will comfortably gear it to over 150mph where as the F28 is possibly more like 200mph at those revs.

Think carefully about the spec, its not what I would be putting in a engine I would be expecting that power from and I am sure many would agree.

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If I could afford the sccr box mate I would consider buying one (donations welcome if you wanna put you money where your mouth is :p )
Like I say I have seen f28's running 600bhp and revving to 8k with not much issue. Cheers

Doesn't Specky use an F28?

Yes and has broken several.

If your building a 275hp all steel xe I can't see why a £1500 gearkit is such an issue.

Trying to build this on a budget WILL end in disaster, I know people who do it for a living and there is a good reason why customers literally spend 10k on such a engine, its also why I didn't build one for my Escort when I felt there was a cheaper alternative.

that the first i have heard of specky blown one :confused:

He isn't the first person to break one either.

They don't like fast changes and its now getting very hard to find a good one or the spares to repair one.

This engine being built needs to be on a sccr gearset minimum, F28 is not suitable.