Turbo upgrade on RV8

[SILICONEKID340HP]

Will tired engines struggle to stay in one piece then there`s the clutch ,brakes etc etc to upgrade .

Can`t see it working on a 100k tired engine .

Edited by SILICONEKID340HP on Wednesday 12th September 09:47

[spitfire4v8]

SILICONEKID340HP said:

Will tired engines struggle to stay in one piece then there`s the clutch ,brakes etc etc to upgrade .

Can`t see it working on a 100k tired engine .

Edited by SILICONEKID340HP on Wednesday 12th September 09:47

Or an engine with a badly fitted engine management system, or on a car with badly fitted underperforming dampers, or an engine full of silicone. These things are common sense surely.

[grahamw48]

Agree.

[jr6yam]

spitfire4v8 said:

SILICONEKID340HP said:

Will tired engines struggle to stay in one piece then there`s the clutch ,brakes etc etc to upgrade .

Can`t see it working on a 100k tired engine .

Edited by SILICONEKID340HP on Wednesday 12th September 09:47

Or an engine with a badly fitted engine management system, or on a car with badly fitted underperforming dampers, or an engine full of silicone. These things are common sense surely.

[Robatr0n]

Looks good and seems a pretty reasonable sum of money for the performance gain.

How much torque would this conversion produce on a 4.0? What are the standard conrods rated to?

[ChimpofDarkness]

Robatr0n said:

Looks good and seems a pretty reasonable sum of money for the performance gain.

How much torque would this conversion produce on a 4.0? What are the standard conrods rated to?

A 45% increase in HP & a 50% increase in torque seems a reasonable expectation.

Lets assume your 4.0 litre makes 220hp and 250ft/lbs of torque at the crank, add the turbo kit and in theory it's going to jump up to 319hp & 375ft/lbs of torque.

It's going to take a very very special 5.0 litre to compete with that in terms of horsepower, & your blown 4.0 litre will still have a healthy torque advantage over that heavily worked over 5.0 litre, it will almost certainly be a much nicer car to drive too.

I'm no expert on the Rover V8 but the cross bolted serpentine engines seem very durable and well up to a bit of moderate boost.

As I understand it there were many hidden improvements with the Serp engine that often get overlooked, not just the oil pump, cross bolted bottom end and the obvious auxiliary drive belt arrangement.

Apparently the pistons are far superior in a Serp motor for example, which is nice if you are considering forced induction.

There are quite a few supercharged serpentine TVRs out there now, and personally I've not heard of one throwing a rod or running it's ends.

Clearly a lot of it will depend on how fit your engine is before the conversion, and that's like saying "how long is a piece of string".

But I would have thought a serpentine engine would make a better starting point for a blown Rover V8 than a pre-serp.

My guess is head gaskets could be the weakest link and the first point of failure, however... ultimately detonation is your engines biggest enemy in a project like this.

That means getting your air temperatures down, your AFR right, the boost under control, & most importantly your ignition timing properly managed.

So the intercooler is definitely essential, as is a decent well mapped engine management system.

[carsy]

Spoke with Eann at the BNG re this kit fitting a pre serp Griff rather than the serp it is currently designed for. He said it was no problem for him to match the Y piece ends to the flat flange of the pre serp manifolds and was more than happy to do this.

[Robatr0n]

Thanks for the input Chimp. Mine is a pre-serp so would be interested to know what the manufactured tolerances are. The last time we tested it, it was putting out 230bhp and 270lbs/ft torque which I was pretty chuffed with all things considered.

[macdeb]

ChimpofDarkness said:

I'm no expert on the Rover V8 but the cross bolted serpentine engines seem very durable and well up to a bit of moderate boost.

Agree with a lot of what you say but not all serp' engines are x-bolted. Most 450's [4.6] are and a very few 500's.

[macdeb]

spitfire4v8 said:

or an engine full of silicone. These things are common sense surely.

sorry Daz

[Goaty Bill]

macdeb said:

spitfire4v8 said:

or an engine full of silicone. These things are common sense surely.

sorry Daz

I was trying to restrain myself, but fk it. It's too funny

[haircutmike]

You guys are cruel.

[macdeb]

haircutmike said:

You guys are cruel.

Daz is cool with it.

[SILICONEKID340HP]

spitfire4v8 said:

SILICONEKID340HP said:

Will tired engines struggle to stay in one piece then there`s the clutch ,brakes etc etc to upgrade .

Can`t see it working on a 100k tired engine .

Edited by SILICONEKID340HP on Wednesday 12th September 09:47

Or an engine with a badly fitted engine management system, or on a car with badly fitted underperforming dampers, or an engine full of silicone. These things are common sense surely.

You talk bcks ! My engine has another 100000 miles of life in it and will outrun any little 4 with the little hair dyer bolted to it ..!!!

Im just trying to make a point a worn engine will not last five minutes under that stress ,the clutch will burn out ,brakes will need upgrading ,bushes replaced etc etc etc ..

Next post "since fitting the fabulous bolt on Turbo kit my engine seems to be smoking"

If I was thinking of forced induction i would have a purpose built low comp engine with the correct cam ,compression ratio and forged pistons(or in my case replace the cam and lower comp what ever way) . Think sticking a Turbo on a worn out standard engine is a compromise because your not getting the most out of the TURBO... You are limited to what boost you can run ..

I would rather have a V8 Developments new rebuilt top hat linered short engine (96mm Bore) 350hp 5l with decent heads rather than a tired engine with a hairdryer bolted to it for around the same price ..

Edited by SILICONEKID340HP on Wednesday 12th September 18:49

[peaktorque]

My 114,000 mile weedy 400 (239 BHP - maybe less now as cam is original) has up-rated brakes already and clutch was done a few thousand miles ago.

Personally I'd rather stick the turbo on the standard engine as it is and see what happens, if it blows up (which to be honest is unlikely anyway) then I'll get it rebuilt to a better spec. Mine is a Serp - but it's not cross bolted, not exactly the best place to start for a top notch rebuild anyway.

[TV8]

SILICONEKID340HP said:

You talk bcks ! My engine has another 100000 miles of life in it and will outrun any little 4 with the little hair dyer bolted to it ..!!!

Edited by SILICONEKID340HP on Wednesday 12th September 18:49

Does this mean you have sorted the problem with the earths on your Megasquirt?

[SILICONEKID340HP]

TV8 said:

SILICONEKID340HP said:

You talk bcks ! My engine has another 100000 miles of life in it and will outrun any little 4 with the little hair dyer bolted to it ..!!!

Edited by SILICONEKID340HP on Wednesday 12th September 18:49

Does this mean you have sorted the problem with the earths on your Megasquirt?

No not yet ,i have no running issues the engine runs very slightly rucher than the AFR on the Tuner Studio.

Low load 15.5 on Tuner studio, 14.9 direct from the lambda ,had a word with the installer and he said all grounds are separate ,there are 9 new ground wires so i can`t see him skimping on grounds .The problem will probably be calibration.

Still got the nodding dog but we all have teething problems

I wonder what i would expect with Eanns kit fitted to my engine ,ok it would need to be low boost and the larger Turbo.

[TV8]

"Nodding dog" - are the new shocks not settled in yet?

[spitfire4v8]

sounds like a wheel frequency error methinks.

[ChimpofDarkness]

TV8 said:

"Nodding dog" - are the new shocks not settled in yet?

I thought he went with Gaz monos as replacements to his Gold Pros?

Is that nodding dog a Golden Retriever?

He throws his wooden shocks away, and the dog keeps bringing them back