About 2.3 20V 7A

[Nuno Cristiano]

Very..very nice Info! I like!

[wildoliver]

Anyone with a 7a that's loathed to rev has a problem! Mine will fly up to rev limit without the slightest difficulty, the cars top speed is purely limited by gearing not running out of puff.

[Nuno Cristiano]

I agree!

Once done with my motor NM 245km/h 7000rpm. It becomes difficult to continue .. for more on the original valve springs and head.

[mcandmar]

Anyone with a 7a that's loathed to rev has a problem! Mine will fly up to rev limit without the slightest difficulty, the cars top speed is purely limited by gearing not running out of puff.

2nd that, had mine up to 6500rpms in 5th. On a private test track of course.

@4Wheel, get a 5-1 manifold as it totally transforms the car. Power band is 5-7k, peak power is around 6300-6400rpms. It should run into the rev limiter with enthusiasm.

[4WheelDrifter]

Getting a tubular would be easy now, but I sold the cq20v about 6 years ago. Mark, I remember being jealous of your avatar when I joined the forum.
In fact I almost bought a tubular a few years ago, just to have as an ornament.

I've just reminded myself of 20v.org.
The torque plot on there sums up how mine felt.




I'm guessing we're saying if you have a post March '90 7A, you need to get a tubular EM.

[istoo]

Just to echo the revs, my 90 wants to go past the limiter. I had it on track recently and the Achilles bell is the gearing for me.getting it to build torque earlier next goal. I see teamwork for me. Got a RE session in jan. Aiming for 200bhp from mine which is achievable on reasonable budget beyond that its big money. Only conversions of the time I have found were ottinger, abt and gti engineering. All circa 200bhp. But in a lighter 90 chassis should make
for a good power to weight ratoo

[mcandmar]

Didnt know the 90 was lighter. They are supposed to handle better as its a more rigid shell than the coupe. I originally wanted a 90q20v but bought the CQ instead.

[Error404]

has anyone ever tried NM cams in a 7A?

[Nuno Cristiano]

My CQ20V use this Camshaft!

[dominator]

The result was terrible...

[Acidburn]

I'd be interested to see a plot Alex.
I always wanted one of those lovely tubular EMs for my 7A,

2nd that, had mine up to 6500rpms in 5th. On a private test track of course.

@4Wheel, get a 5-1 manifold as it totally transforms the car. Power band is 5-7k, peak power is around 6300-6400rpms. It should run into the rev limiter with enthusiasm.

If you can find a later car without the tubular and fit one to it then it will yield good results. Plus certain ecu's (error's plus the 20vcq I just got rid of) can be chipped by spink on here to help with getting a bit more power.

My 20v quattro sport was superb for revving, low down used to suffer but once opened up used to scream (ask the residents in chelmsford high street ) and i've had that way off the clock before.

I know stiglet was thinking of going stroker 7a as he's got the bottom end plus a tsr head to go with it but don't think much happened. I'd have loved to get more out my 20vcq but want to sort my urq.

[psiconauta911]

I agree!

Once done with my motor NM 245km/h 7000rpm. It becomes difficult to continue .. for more on the original valve springs and head.

I have taken my NM to the rev. limiter in 5th as Nuno, did it twice, 245Km/h first time and 250 the next one with 7,...K rpm, with the old hitachi injectors and original Tubular Manifold.

[Ryss]

Read with interest as one of my projects is a modified 7A in a 1985 Audi 90 Quattro 4 door.
Have had head ported, cams ground and modified the inlet so there are two throttle bodies. Have no idea if this will work and if not will just blank off the new opening. ECU will be a local Gotech system.

As found this article about a 275 HP 20V engine on the www, but can not find the original article now, so to quote:-

AUDI 90 QUATTRO Forest Specification

file:CSP10516.SPC
Car:
-registration MN 90 44

-history Built new by GBM Rallye-Sport in January 1989 from all new parts to full Group A Audi Sport specification.
Used in 1989 British Rally Championship by Andrew Wood, sponsored by Castrol/Wagon Finance with four top-ten finishes. Used in 1990 by Jim McRae, sponsored by Shell/Gemini, won Granite City, numerous top ten finishes. Used 1990-91 by Bob Locke for some Scottish Championship events including 2nd at Galloway Hills and Scotphone. Used by Chris Wagner to finish second in Scottish Championship series 1992. Exported 1999 to USA, used 1999-2001 in selected events by Alex Erisoty to win SCCA ProRally Rookie of The Year and tie in points for Northeast Division Open Championship. Numerous top-ten finishes.

Body:
-construction Shell (No B3/2) prepared by Matter (W. Germany), seam welded galvanised steel 4 door- saloon with integral Chrome/Molybdenum safety cage to full Audi Sport specification. Wheelbase lengthened (approx 100mm) to permit use of 16² wheels and to improve stability. Aluminum inner door frames and panels. Lightweight front screen, heated rear screen. Kevlar front and rear underbody guards. Quick lift jacking points (4) in sills.

-subframes competition strengthened subframes with eccentric spacers for adjustment of driveshaft angles and wheelbase.
-kerb weight 1130kg
-dimensions 4394mm long x 1704mm wide x 2537mm wheelbase.

Engine:
-type Full Group A, 5 cylinder in-line, iron block, Audi Sport S1 20v alloy head. Built by Motorentechnik Kolb of Ingolstadt (Audi Sport). 3 point magnesium- aluminium competition mounts to chassis. Water cooling by aluminium radiator with 700 W 2-speed motor mounted in Kevlar shroud. Twin, switchable, Bosch competition fuel pumps on quick release, self sealing couplings to system. Large bore, quick-release, competition exhaust system. Latest specification Year 2001 (Formula 2) Kolb pistons. 300 BHP.

-capacity 2.5L (2479cc), 82.5mm bore x 92.8mm stroke
-max. rpm 8200
-compression ratio 14 : 1
-induction Bosch Motronic electronic fuel injection
-reciprocating assembly Audi Sport billet stroker crank(92.8mm)-knife edged. Audi Sport polished steel connecting rods, Audi Sport (Kolb) 14:1 pistons
-valvetrain Audi Sport Group A valves, springs, lifters
-camshafts 2 ohc by Audi Sport (Kolb), individually adjustable gear drive
-lubrication Finned alloy wet sump with trap door baffles and fabricated steel windage tray. Engine breather separator/catch tank. Oil cooled by Setrab aluminium cooler.

Transmission:
-drive Permanent four wheel drive, 50/50 fixed torque split with no centre differential.
-gearbox Competition long rally box incorporating plate type limited slip front differential. Light alloy mounting.
-gears 6 forward gears (3.500/2.273/1.706/1.318/1.040/0.889) reverse (3.500) Rose jointed, competition gear linkage with electric clutch button.
-rear differential Light alloy, competition unit with plate type limited slip differential and integral competition mounting.
-final drive ratio 4.86
-clutch Sachs (S1) twin plate. Electric operation option.
-driveshafts Competition heavy-duty (S1) shafts, adjustable for plunge. Kevlar driveshaft guards.

Steering:
-rack Competition ZF long (Sport S1) unit, 13.4:1 ratio with power hydraulic assistance. Aluminium off side mounting.
-steering column Group A (as GpA Audi 200) column, fitted with Personal Grinta¹ leather/alloy steering wheel, 1.75 turns lock to lock.
-power assistance Audi Sport competition high capacity pump fitted with alloy deep-v drive pulley. Tensioner. Baffled and filtered reservoir, and aluminium Setrab fluid cooler, full Aeroquip lines (entire car Aeroquip).
-steering arms Competition arms front and rear, all rose jointed to adjusted for toe-in/out.

Suspension:
-front/rear Magnesium alloy (Sport S1) McPherson struts with Boge inserts(V70/H69 settings), S1 competition top mounts, adjustable ride height and castor. Tubular competition wishbones, fully rosejointed and adjustable for camber.

Brakes:
-type Front/rear 295mm vented discs with light alloy 4-pot AP racing calipers. Dashboard brake bias front/rear adjustment via competition aluminium die-cast pedal box and twin master cylinders to dual circuit hydraulic system. Steel brake guards. Full Aeroquip lines.
-pads Mintex M171
-handbrake Fly-off competition magnesium/alloy handbrake, operating rear brakes with hydraulic assistance.

Running gear:
-wheels Magnesium alloy OZ racing 7¹x15¹, 5-stud fixing, with titanium wheel nuts. Spares (one or two) mounted in boot with quick-release belt fixing.
-tyres Pirelli ASG 195/65x15 K60 (soft) compound.

Electrical:
-wiring loom Aerospace specification, lightweight fireproof PTFE cable. Dashboard fuse panel with Glow fuses¹. Quick release control and instrument panels.
-generator 150A alternator
-battery Heavy duty dry cell with quick-release Anderson¹ connector.
-instruments Speedometer, Stack¹ non-linear tacho with computer readout and interface, oil temperature/pressure, water temperature, fuel system/control pressure, voltmeter, fuel contents.
-ancillaries Halda Rally Computer with foot operated remote zero, 2 x map lights, radio/Poti connections, roof aerial, foot operated air horns.
-lighting Aluminium auxiliary lamp bar for 4/6 lamps. PIAA or Cibie Turini (carbon fibre) lamps; 2 x spots, 2 x drive, 2 x virage (cornering). Quick release military specification multi plugs (gold contacts).


Equipment:
-safety Lifeline, aluminium, plumbed-in electric fire extinguisher system (2.5kg+5kg). 2 x 2.5kg hand held extinguishers. Sabelt 6-point (with crutch strap) aircraft buckle full harness seat belts. Rubber bladder, foam filled, 70L fuel cell in aluminium housing with quick release, auto sealing connectors.
-interior Collins Kevlar seats on adjustable aluminium brackets. Bilstein quick lift jack. Wheel brace. Foam helmet box. First aid kit. Emergency warning triangles. Tow rope. Tool kit in roll.

Interesting to say the least.

[istoo]

ryss

http://www.motorgeek.com/viewtopic.php?t=33162

Colin Macraes dad owned it, and it won the granite city,... edit must read whole thread!

[mrt105]

Just been looking through this thread as i'm interested in working on my 7a block.

The head on my coupe has already been ported by tony-4v6 on classic audi with nice results, it also has the 034 injectors fitted, ECU remapped by AMD, tubular manifold with ss exhaust.

What i'm looking to find out is where i can find a 92.8mm crank, eurospecsports in the states do one - http://www.eurospecsport.com/product...rankshafts.htm.
Does any one have any experience of this company?
Also is there anywhere closer to home where i could source one from?

I'll be coming down to the rolling road day at MRC next month so i can finally get some figures on the power output on the coupe as it stands now. It feels sharp as it is, but it would be nice to do something with the bottom end.