[engine_work] Project Sarty

[jimistdt 1]

My brother fabricates bespoke Gaskets 0.01mm upwards or something ridiculous. Let me know if thats any help, Sarty.

[Super Josh 4]

A lot of V8 American mobiles use them apparently.

 

Yeah, but probably a low comp, low reving lazy old thing. I'd stick with a cometic one one a high comp. XU

 

 

Josh

[B1ack_Mi16 67]

Cometic can get you gaskets in lots of thicknesses, from approx 0.7mm to 3mm ish..

 

I can just mention my 2.3 engine is running 11.6:1 in compression, and optimized squish height.

 

And my cams are quite wild, 3.8mm lift @ TDC on inlet and 3.25mm @ TDC on exhaust.

Also 12.45mm max lift inlet and 11.80mm on exhaust..

 

Engine is quite amazing and I'm sure the stage II from petert is not this wild?

 

I really wouldn't bother trying to change the compression, too much is not good either so just try what you've got and see how it works.

 

The better headwork and inlet tract etc. the more air into cylinder.. the less compression you need really.

[petert 586]

I agree. I wouldn't pull the engine apart to gain a few points of CR. 11.6:1 is great and more than ample for the Stage II regrind. You'll get more zing from spending the money loosing weight in the car.

 

I also warn against using a Cu gasket on an iron block. Unless you o-ring the block it's guaranteed to leak with that much CR.

[DrSarty 90 1 Cars]

Thanks for the comments Pit Crew etc re compression (& weight).

[DrSarty 90 1 Cars]

Well, here we go.

 

In some ways, this is my project over and done with.

 

Dave at Emerald kindly overlaid the two session graphs (attached), each showing power and torque comparing the old manifold and body set-up with the new one.

 

Below are some highlights from my outstanding day. It seems we have created a monster.

 

Old: 195.1BHP @ 7,084RPM

New: 240.2BHP @ 6,625RPM !!! !!!

 

Old: 188.4lb/ft @ 4,713RPM

New: 196.1lb/ft @ 4,639RPM b !!! !!!

 

My fuel economy has shot throught the roof too, which is nice, as Dave had to reduce (take-away) a lot of the fueling, sometimes as much as 20%. Told you it was rich.

 

From a brimmed tank at lunchtime at Emerald in Watton (Norfolk), now that I've just arrived back in Macclesfield after a 181 mile trip, plenty of WOT and hoonage with the new map after it had an afternoon of rolling road hammering and some 30miles not going anywhere, my fuel gauge is still showing 1/3rd full! It got to 3/4 full after an amazing 100miles! We are easily within 300miles per tank. I am an extremely happy boy.

 

After a month of my self-imposed limit, WOT is fantastic, and I even managed to beat a Nissan Skyline on the A47 this evening, with my car being loaded with bags of clothes, a PC, speakers, 10 litres of oil and my silly 20kg bass box. It's quite silly really.

Emerald_Power_Plot.pdf

Edited February 9, 2009 by DrSarty

[Henry 1.9GTi 36]

nice

[platty 1]

Marvellous, and what an increase, happy days!!!!

[welshpug 1,657]

holy moly!

[Anthony 1,003]

Impressive

 

Told you the other inlet manifold would have been holding the engine back, but that's a big difference considering as far as I know the manifold and throttle bodies is pretty much all you changed isn't it? Bet you're glad you spent the money getting a proper one now?

 

Should be very interesting when you evolve the engine to the next stage with the Stage 2 inlet / Stage 1 exhaust cams and the staged injectors, as that should liberate a bit more power, particularly towards the top end. Should be a genuine 240-250hp then (if you assume that with the spike removed in the current power run that you're talking 225-230hp)

[Alastairh 47]

Great result. I bet your a happy boy!

 

Al

[DrSarty 90 1 Cars]

(if you assume that with the spike removed in the current power run that you're talking 225-230hp)

 

Exactly what Dave said: a genuine 225-230 motor.

 

We definitely had 180BHP at the wheels, but we had to lash the thing down to prevent wheel spin.

 

The staged injector idea MAY be shelved, and I'll use the graph to discuss this with PeterT and Sandy to see whether a cam swap is actually worth it. The reason is it may just generate the horsepower higher up the graph, which is not really what I want.

 

This car is supremely drivable.

 

On normal lift-off over run, I mean not even after hard acceleration and at night, you are occasionally treated with a nice pop and flash out of the back. Everything about this car is making me smile.

 

I owe a lot to QEP for building a great engine, and to many others on here who have contributed with advice and sometimes constructive criticism.

Edited February 9, 2009 by DrSarty

[GLPoomobile 958]

That's f***ing hilarious

 

How did you react to the final result Rich?

Edited February 9, 2009 by GLPoomobile

[westy 0]

Wow, great result, i bet you're chuffed

[DrSarty 90 1 Cars]

That's f***ing hilarious

 

How did you react to the final result Rich?

 

I know.

 

Smiles that actually hurt.

[taylorspug 7]

Nice work Rich, great result thoroughly well deserved after all the time and effort (not to mention money!) you have put in. Well done!

[16v205 9]

Congrats about time your engine showed what its capable of Excellent result Rich well done, bet that was fun driving home in the sludge and snow?

 

Rich

[pip470 61]

Not many people come back from the rolling road with numbers surpasing thier expectations. Well done Rich. I cant wait for the next meet now.

[Arahan 4]

fantastic!

[madant_uk 0]

As i said earlier nice one, bet your over the moon

[Bonzai 2]

thats a great reward for your time and effort, and i agree, the engine doesnt really need any further fiddling. Time to enjoy motoring fully.

[oli-pug 6 2 Cars]

What a fantastic result! Bet that shifts along nicely, bring on the dry roads

[DrSarty 90 1 Cars]

Just converted the PDF to a JPEG to show the graphs mentioned above.

 

 

Dotted lines are the first mapping session - solids today's. It's funny how the 188lb/ft peak on the original wasn't a spike, it's what the engine does. However now it's fatter and 7lb/ft more. But then later on, when the original engine seemed to be dying, we've found nearly 25lb/ft more torque, levelling out the line meaning more power there whenever I want it.

 

It goes nuts from 4.3k up to 4.7k, has a little breather and then goes bonkers again from 5.1k. And it sounds like a Supermarine Spitfire, with less cylinders.

 

I've never driven a car this powerful. What's funny, is times when you reach a hill and expect the engine to begin to bog down. So you apply a little gas and then start accelerating like a bastard up the hill. You just can't help smiling.

 

I don't think I'll ever get over the fact that a 1.9 Mi16's peak torque is 133lb/ft. This is producing 142lb/ft at only 2.5k rpm, which means I could be pulling away with the rotational force that a standard Mi has at full chat!!

 

It's all a new experience for me.

 

Roll on Friday (my birthday) when GLP and I can go hoon the Hatfield tunnels.

Edited February 10, 2009 by DrSarty

[Sandy 191]

Excellent news

[Super Josh 4]

Nice one Rich, amazing what a decent induction system can do to liberate that hidden power Roll on Friday

 

 

 

Josh