New engine question (non Audi)

Stu · 23-08-14, 02:45 PM

Hi all,
If you had an engine built from scratch, and you asked the engine builder for 180bhp spec, and after rolling road tune showed 155bhp, is that expected?

Coxy · 23-08-14, 02:51 PM

wheels or flywheel??

180 at the flywheel could equate to 155 at the wheels on a rolling road.

Stu · 23-08-14, 03:05 PM

flywheel, wheels 122bhp.
Engine builer said set ignition @ 30 deg @ 3500rpm,
Rolling road tuner said 30 deg ignition would loose power, so i think it was set at about 25ish, engine builder says that mild and he should have set @ 30 and took it to 7500 rpm, not as he droped off @ 6500 rpm

Coxy · 23-08-14, 04:12 PM

what engine is it and what's been done to it to get a higher power output?

Stu · 23-08-14, 04:20 PM

pinto 2.0, Crank reground an balanced. Rebored, injection rods, mshle pistons. Ported head, big valves, HT1e cam. Rods resized, Mahle bearings, & mains big ends and thrusts. Refaced block. New valves springs an followers. New glyco cam bearings.

Coxy · 23-08-14, 05:13 PM

what does the standard 2.0 pinto make out of the factory?

Stu · 23-08-14, 05:14 PM

110 bhp

msh · 23-08-14, 05:24 PM

Quote:

Originally Posted by Stu

pinto 2.0, Crank reground an balanced. Rebored, injection rods, mshle pistons. Ported head, big valves, HT1e cam. Rods resized, Mahle bearings, & mains big ends and thrusts. Refaced block. New valves springs an followers. New glyco cam bearings.

As long as you're not doing as builder says, you cannot blame him.

Anyway, is it 8v engine? Does it have carb or L-jet? Vacuum ignition?

Stu · 23-08-14, 05:27 PM

Quote:

Originally Posted by msh

As long as you're not doing as builder says, you cannot blame him.

Anyway, is it 8v engine? Does it have carb or L-jet? Vacuum ignition?

Not blaming builder, as I know he's good,
8v, twin45's no vacuum.
I think it needs more running in, and more advance on ignition, trouble is finding good rolling tuners

Andy10v · 23-08-14, 08:17 PM

You will also get large variations from dyno to dyno depending on calibration factors etc.

Did you try the ignition timing the guy the built the engine suggested?

It is actually being tuned on a dyno, or just tested for output? I would have thought you want to keep advancing timing until MBT, then retard a couple of degrees for safety (whilst listening very carefully for knock).

23-08-14, 08:17 PM	#10
Andy10v Grown up member Classic Audi Club Member Join Date: Dec 2008 Location: Stirling Posts: 861	You will also get large variations from dyno to dyno depending on calibration factors etc. Did you try the ignition timing the guy the built the engine suggested? It is actually being tuned on a dyno, or just tested for output? I would have thought you want to keep advancing timing until MBT, then retard a couple of degrees for safety (whilst listening very carefully for knock). __________________ 2005 350z GT Sold-1992 3B S2 coupe-RS2+, 996s, konis, forged rods, rear torsen.... Sold-1993 ABY coupe

23-08-14, 02:51 PM	#2
Coxy 4 Ring Mafia Classic Audi Club Member Join Date: Jul 2007 Location: on the side of a hill in Shropshire! Posts: 28,215	wheels or flywheel?? 180 at the flywheel could equate to 155 at the wheels on a rolling road.

23-08-14, 03:05 PM	#3
Stu Grown up member Classic Audi Club Member Join Date: May 2013 Posts: 159	flywheel, wheels 122bhp. Engine builer said set ignition @ 30 deg @ 3500rpm, Rolling road tuner said 30 deg ignition would loose power, so i think it was set at about 25ish, engine builder says that mild and he should have set @ 30 and took it to 7500 rpm, not as he droped off @ 6500 rpm

23-08-14, 04:12 PM	#4
Coxy 4 Ring Mafia Classic Audi Club Member Join Date: Jul 2007 Location: on the side of a hill in Shropshire! Posts: 28,215	what engine is it and what's been done to it to get a higher power output?

23-08-14, 04:20 PM	#5
Stu Grown up member Classic Audi Club Member Join Date: May 2013 Posts: 159	pinto 2.0, Crank reground an balanced. Rebored, injection rods, mshle pistons. Ported head, big valves, HT1e cam. Rods resized, Mahle bearings, & mains big ends and thrusts. Refaced block. New valves springs an followers. New glyco cam bearings.

23-08-14, 05:13 PM	#6
Coxy 4 Ring Mafia Classic Audi Club Member Join Date: Jul 2007 Location: on the side of a hill in Shropshire! Posts: 28,215	what does the standard 2.0 pinto make out of the factory?

23-08-14, 05:14 PM	#7
Stu Grown up member Classic Audi Club Member Join Date: May 2013 Posts: 159	110 bhp