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2 single turbo conversion

I did some homework on the LS stuff last night. I think you could manage it for £10-12k or thereabouts and you would have a seriously mighty whip there. It makes a lot of sense, and there is the added bonus of sending the purists into palpitations. It also think it could be a pretty strong car on the second hand market, as there are plenty of standard cars out there to satisfy that need, but there isn't anything that sits between a C2 and a Turbo at the moment. I'd pay £20-25k all day long for a C2 with a 520hp V8 in it. The same money spent with Hartech on a 3.7 upgrade/rebuild would only net you in the region of 350hp.

(That's not to say a Hartech rebuild isn't worth it, they are the acknowledged experts in this field and I wouldn't consider a rebuild by anyone else. It's just that Ned is talking about doing a one-off that's a bit more left field)
 
I can't really see the downside Martin. I had been looking at second hand engines but there's not as much for sale as I'd thought. I've found an ls1 supposedly with a hotter cam and other bits with a t56 gearbox at reasonable money and I'd say the box would fetch decent money back leaving it a good price.
It's the tuning potential afterwards that's appealing. You could end up at mega hp. I've played the game before of chasing numbers and it's never ending. A proper roller coaster of highs and lows but when it goes well, it's a hell of a buzz
 
If Hp is what you want then LS it is. I think there is more to it than that though. I personally love the flat six noise and would do almost anything NOT to loose that. Ive never really liked V8 noise anyway though.

Also regarding the turbo, dont build what you can buy from factory.

The C2 chassis would need some upgrading to handle 400+ so your not necessarily making a better car by adding +200hp. Id argue is a fine balance as they are, a heap more power will upset that balance. Hence the Gt2 widowmaker name.
 
The more I think about the v8, the more I like it. Cash flows not great atm but as I've already said, if someone wanted the 3.4 then I'd definitely consider it. The cars off the road for a while anyway for other work.

Just out of curiosity, what's the 3.4 worth?
1998 car, 75'000 miles, full history either Porsche or specialist except for one stamp that was an ordinary garage. New denso iridium plugs and surefire coil packs less than 1000 miles ago. Full ss manifolds, what look like 200 cell cats and ss rear boxes. Unsure of make. Made 298hp on a rolling road recently. All runs very well and smoothly. Only downside is a slight tapet noise on cold start for around 30 seconds. Still in the car and can be heard running though I'm not keen on starting it on the axle stands but could soon sort that out.
Also I've a new Sachs clutch and genuine ems there for it too.

The engines fine but I just like to be greedy with the hp
 
I reckon an engine like that has to be worth at least £4k. Tappet noise on cold startup that goes away after a brief period of idling is totally normal.

Also, don't you need an LS3 rather than an LS1 for the ali block (iron on the LS1)?
 
Possibly right on the block but I had assumed they were both alloy. Blocks are obviously different but apparently very close in fitment. Ls3's are way ahead in head design and flow and hp and torque are well up but so is the price
 
Am watching a series on youtube, where the guy is using an LS engine in a wrecked Hurrican. The power that you can get from them is immense - he is using components (including an uprated block) from Texas Speed, who are apparently experts on LS engines.....They have a youtube channel that's worth a watch.
 
I've seen that lambo coming up on my recommended. I'm on part 54 of home built by Jeff porsche atm. Only got YouTube on the tv recently. I would never have bothered watching anything on the phone.
The ls' seem to be the answer to an awful lot of conversions. Seem so basic yet awesome
 
How about transanting the engine and running gear from a 996 turbo in to your car? You could run a single turbo if required and would have a very solid engine capable of making the power. It probably wouldn't cost that much different overall either. £20k for a good used 996 turbo engine and gearbox, £7k back for your used good 3.4l engine and gearbox. You would not get a M96.01 engine rebuilt and strengthened enough along with the same for the gearbox for £13k.

MC
 
Poses the question where to put the inter coolers- I suppose if you are doing bodywork currently then adding scoops into the flanks to feed the 'coolers would be the logical thing to do, if staying with twin turbos.

However changing to a single turbo- maybe an inter cooler in a whale tail spoiler, as Porsche did with the air cooled turbo cars?
 
Mc if I was to do anything it would be on a much smaller budget than that. That's the idea behind a v8. I would never be fitting a new one. Second hand would be the only way for me on my budget.
Do you really think the engine and box would fetch 7k?

As for cooling on a turbo, at the minute I'd be thinking of a water to air set up.
The extreme would be a v8 twin turbo set up but that's just way over the odds with money.
 
In round figures you are looking around £5k for a complete, known good engine, and around £2k for a good gearbox.

MC
 
5k sounds like a tempting proposition. I've found a few ls1's at around 4K. They're only rated at 350hp but can easily be breathed on. There's also a big plus on the torque which I think the 996's gearing could use as I've always found it very long.
If I had one engine out and another sitting with a grand change to start on bits to fit it, I'd be off to a great start.
Thing is, do I try making the mounts and other bits or just bite the bullet and buy? This would turn into a longer project than first started.

How would I get round the issue of cats? I would be happy enough to have a go at making manifolds and exhausts. Dummy cats maybe?
 
Why not fit real cats? It won't get through an MOT legally without them, and would be much more awkward to sell on.

MC
 
It would be added cost basically.

I could really do with getting off my arse and finishing the bodywork first :floor:
 

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