Hi there i am re building a punt gt mk1 i have had every thing lighten and balanced with bigger pistons does any one know any thing about punto turbos and give me some advise with whats best todo ? Example turbo injectors fuel pump throttle body etc

Copied from other thread (didn't realise you had started a dedicated thread)

You want to head over to www.puntosportsclub.co.uk/forums and take a look at the projects page. There's a lad over there by the name of 'Superman' (Dan) that had 226 BHP out of the GT. He's now got rid of his Puntos in favor of an Evo (the Mitsubishi type, not Fiat), but still hangs around the forum and is most helpful.

Typically though, the recipe goes somewhat like...

Bigger turbo (Owen's Developments modified Garretts seem to be the turbo of choice)
Turbo hardware (standalone dump valve, boost controller etc...)
Aluminium front-mount intercooler and piping
Dr Evil turbo elbow (search that forum for 'Dr Evil' to have one made)
Power on the Road SEB map-on-a-chip (search forum for 'Mr Hans' for supply, he's a bit of a argumentative bighead at times, but knows his stuff)
Bigger aluminium radiator
Bigger injectors (size depending on stage of tune)
Coupe fuel pump to feed larger injectors
Forged pistons
Forged con-rods
Lightened and balanced crank
ARP bolts
Uprated cam
Lagged Mongoose exhaust
Pipercross induction

With that little lot, you'll have a car with far too much power for its chassis to handle, so you may wish to consider...

Uprated springs and dampers (such a diverse topic, I shall not discuss here)
Uprated anti-roll bars (Only Eibach do these for the GT, and there's only like 100 in the country. Balance Motorsport claim to be able to get hold of them new though)
Strut brace
Uprated tyres (for fast-road, sticking with 14" is probably best)
Uprated brake pads (for fast-road, the GT3 Bendix (not GT1 Girling) calipers and 257 x 20mm discs up front are fine, just invest in good pads like Ferodo DS. Aluminium alloy rear calipers are available as an option for reducing unsprung weight at the rear.

If considering track-day use, add the following...

Coilover suspension
Race seat with four-point harness
Roll cage
Uprated front brakes (will require 16" wheels with 195/40 R16 tyres, Brembos 4-pots from the Coupe with custom brackets and Coupe discs are a common upgrade, less common is a Wilwood setup, and if you are feeling flush (£1500), AP Racing do an excellent front kit for the GT. Exercise care with the Wilwoods since they are not dust sealed)
Plumbed-in fire extinguisher
Quaife LSD (there is a group-buy for these on PSC, but don't expect to get your hands on one anytime soon)

About £15000 should cover it

WhiteSei said:

About £15000 should cover it

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WOH ....

has any one seen the punto GT tuned by RSP? 300bhp and it is amazing in the videos.. maybe an inspiration but i'd never have the money
but they managed with stock rod and pistons??!

WhiteSei said:

About £15000 should cover it

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And I bet some of the PSC guys have rinsed that much money into their cars too

Momanatorz said:

has any one seen the punto GT tuned by RSP? 300bhp and it is amazing in the videos.. maybe an inspiration but i'd never have the money but they managed with stock rod and pistons??!

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Is that not the Coupe 16VT 2.0 litre turbo engine in that GT? I wouldn't have even expected the head to hold together at 300 BHP in the 1.4, let alone the stock pistons and con-rods. 300 BHP out of the Coupe engine is not such a problem, it's just fabricating all the parts required to fit it that is the pain in the backside. I just wouldn't fancy a car with such a huge front-to-back weight bias though.

MikeSalt said:

And I bet some of the PSC guys have rinsed that much money into their cars too

Is that not the Coupe 16VT 2.0 litre turbo engine in that GT? I wouldn't have even expected the head to hold together at 300 BHP in the 1.4, let alone the stock pistons and con-rods. 300 BHP out of the Coupe engine is not such a problem, it's just fabricating all the parts required to fit it that is the pain in the backside. I just wouldn't fancy a car with such a huge front-to-back weight bias though.

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No apparently it is the 1.4 8v GT ! 1.7 bar i think

Momanatorz said:

No apparently it is the 1.4 8v GT ! 1.7 bar i think

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That's what we call a pump, squirt and rebuild car. At 226 BHP, 'The Mint GT' was being rebuilt pretty much fortnightly, and that had the forged pistons, con-rods and balanced crank.

MikeSalt said:

That's what we call a pump, squirt and rebuild car. At 226 BHP, 'The Mint GT' was being rebuilt pretty much fortnightly, and that had the forged pistons, con-rods and balanced crank.

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hmm, dunno how long the RSP punto lasted...

The Japanese manage to get 120bhp (at the crank) from 600cc so maybe 240 from 1200cc?

But they do it with massive revs and no turbo. Yamaha's R6 red-lines at 17000 rpm. They also seem to be surprisingly reliable.

The downside is little power below 8000 and the real go sits above 12000.

The Suzuki Hayabuse 1300 can be turbo'd but who knows if it will last more than a few standing 1/4 miles. In a bike you cant get the power down without flipping it sothe engine wont get the hammering it can in a car.

TBH if I had that much power in a Punto, I'd also want 4 wheel drive. How about VW syncro transmission from the Polo.

WhiteSei said:

The Japanese manage to get 120bhp (at the crank) from 600cc so maybe 240 from 1200cc?

But they do it with massive revs and no turbo. Yamaha's R6 red-lines at 17000 rpm. They also seem to be surprisingly reliable.

The downside is little power below 8000 and the real go sits above 12000.

The Suzuki Hayabuse 1300 can be turbo'd but who knows if it will last more than a few standing 1/4 miles. In a bike you cant get the power down without flipping it sothe engine wont get the hammering it can in a car.

TBH if I had that much power in a Punto, I'd also want 4 wheel drive. How about VW syncro transmission from the Polo.

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alls fun with 2wd until you get 4wd :yum:
i've always wondered how bike engines rev so much higher than car engines? tighter clearances and better engineering ?
same with a american v8 and a f1 v8...

I think bikes have a shorter stroke, so the speed of the piston relative to the cylinder wall is slower for a fixed RPM. Of course, a shorter stroke leads to less torque.

MikeSalt said:

I think bikes have a shorter stroke, so the speed of the piston relative to the cylinder wall is slower for a fixed RPM. Of course, a shorter stroke leads to less torque.

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Aha... same with F1?

Momanatorz said:

Aha... same with F1?

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Yeah, not alot of torque required in something that weighs much less than a tonne and will spend most of its time in the 10,000RPM+ range. This is not really practical in a road car.