thanks mate, shall do.

Got this dyno sheet with my ca, not 100% sure on internals etc, but here's what i know:

cheap forgies
reconditioned head
stock computer (dyno reading taken with one of those piggyback ecu's which i didn't get with the motor)
T28bb turbo
standard manifolds etc.
kinda forgotten what else... got reciepts somewhere....

It'll have a frontmount by the time its sorted, not entirely sure if it had one before or not.

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White '74 1200 ute with a L20b, extractors weber and 5 speed.

I have nothing to hide (even from my competitors), so here is what I know about the engine.

L18 1898cc (Standard stroke, think 88mm forged VW pistons)

Head - Brookfield Down Draft Head. Inlet ports raised about 1cm, external water jackets, custom inlet manifold. Can't remember the size of the valves. 76 Degree Cam.

Extractors, free flow muffler, 2.5 inch exhaust

Fuel : BP Ultimate

Dyno Results :

Torque = 662N.M @ 112kph, which equates to 662/4.875(diff ratio) * 1.15 = 156 N.M at the flywheel.

80KW @ 134kph at the wheels

Motive Force = 2364.4N@112kph

Anyone have any results from a similar engine?

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Datsun 1600/H510 PRC Rally Car - L20B under 2 litre, EFI, 5 speed Hollinger, 5.1 LSD.

Datsun 1600/H510 PRC Rally/Road Car - L20B under 2 litre, downdraft webber, extractors, 5 speed.

Datsun 1600/H510 Classic C2 Rally Car - Autech SR20 EFI, SR20 5 speed with 3 gear close ratio conversion, 4.8 LSD.

1969 Datsun 1600
L20b
280ZX valves, ported A87 head
Wade 640A cam, 12.9mm valve lift
10.5:1 comp
Custom extractors with 2.25inch exhaust
Custom quad throttle bodies
Autronic SMC computer
3.9:1 R180
Dyno Dynamics chassis dyno
95 rwkw on EFI
(made 92 rwkw with 2x45DCOE, Datrally manifold, 36mm chokes see dyno sheet above)


1971 Datsun 1600
S13 SR20DET
S14 turbo
Turbosmart bleed valve
450x300 FMIC
3 inch mandrel exhaust
Dyno Dynamics chassis dyno
190rwkw @ 16psi

Although its not a datto,


1981 Toyota Crown
88 Supra 7MGTE 3L turbo
3 inch mandrel exhaust
Turbosmart bleed valve
HKS Fuel cut defender
Cometic Gasket and ARP head studs
Dyno Dynamics chassis dyno
210rwkw @ 11 psi

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1971 Datsun P510 SR20DET 276 rwkW
2005 Mercedes AMG E55 350 kW
1969 Datsun P510 L20B EFI 95 rwkW
1975 Ford XB Fairmont GS Wagon 179rwhp
1980 Escort Van SR20DET unfinished
2002 Suzuki GSX1300R Hayabusa 185hp

Apart from the obvious 3kW, what other differences are there between efi and carb ??

torque, driveability, ??

Is it worth the added cost of going efi on something like a track car ?? I guess for a street car, the efi should make for a better behaved engine ??

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1970 ex Group A Rally P510
1971 P510
1972 180B SSS
1965 SP310 Fairlady
1966 SP311 Fairlady

Yes the midrange and driveability are very much improved. Also much easier starting, better fuel economy.
For a track car, it's probably not worth it... it depends on what bits you already have I suppose... Webers are pretty exensive these days, and tuning them properly is also an expensive exercise whereas EFI system components are becoming cheaper all the time.

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1971 Datsun P510 SR20DET 276 rwkW
2005 Mercedes AMG E55 350 kW
1969 Datsun P510 L20B EFI 95 rwkW
1975 Ford XB Fairmont GS Wagon 179rwhp
1980 Escort Van SR20DET unfinished
2002 Suzuki GSX1300R Hayabusa 185hp

I'm thinking about giving the L18 in my old 1600 a freshen-up with a new high-compression bottom end after Datnats - I've got a set of Solex's and a set of Dellorto's to choose from, so I'll probably stick with them if there's no huge benefits in efi for a track car.

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1970 ex Group A Rally P510
1971 P510
1972 180B SSS
1965 SP310 Fairlady
1966 SP311 Fairlady

Hi Turbovan - what capacity is your L20?

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Datsun 1600/H510 PRC Rally Car - L20B under 2 litre, EFI, 5 speed Hollinger, 5.1 LSD.

Datsun 1600/H510 PRC Rally/Road Car - L20B under 2 litre, downdraft webber, extractors, 5 speed.

Datsun 1600/H510 Classic C2 Rally Car - Autech SR20 EFI, SR20 5 speed with 3 gear close ratio conversion, 4.8 LSD.

Got the racing bug now

I'd probably go with the dellortos, easier to find bits for, are they 45mm?

_________________
1971 Datsun P510 SR20DET 276 rwkW
2005 Mercedes AMG E55 350 kW
1969 Datsun P510 L20B EFI 95 rwkW
1975 Ford XB Fairmont GS Wagon 179rwhp
1980 Escort Van SR20DET unfinished
2002 Suzuki GSX1300R Hayabusa 185hp

It's 1975cc (.020" overbore and stock crank)

_________________
1971 Datsun P510 SR20DET 276 rwkW
2005 Mercedes AMG E55 350 kW
1969 Datsun P510 L20B EFI 95 rwkW
1975 Ford XB Fairmont GS Wagon 179rwhp
1980 Escort Van SR20DET unfinished
2002 Suzuki GSX1300R Hayabusa 185hp

Yep Nothing serious, just looking at doing hillclimbs, motorkhanas and supersprints with one of the local car clubs up here (the Newcastle MG Car Club). They own a little hillclimb track not far from home. That's what I originally bought the old green 1600 for round 10 years ago - but then I went and had kids and that was the end of life as I knew it Now that they're older, I've got a bit more spare time....
Nope, 40mm. I also have a set of 20V 4AGE quad throttle bodies, so just need an ecu to go efi.

_________________
1970 ex Group A Rally P510
1971 P510
1972 180B SSS
1965 SP310 Fairlady
1966 SP311 Fairlady

Apologies for not replying, have not been on the forums for a while

Would love to post the dyno sheet........IF I HAD IT! The tuner went on about the computer having a problem or some crap....long story short........ I don't have it...... never mind though, the new engine is under way and will be ready for the start of the 2007 season. Once it is ready, I will get it on the dyno and be sure to get a print out this time round.

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www.full-throttle.com.au
www.boostcooler.com.au

When the Flag drops........... the Bullshit stops
Go hard or go home!

It has a bit more power than what this says... Approx the 330hp mark

RB20 - Auto - 3.7 diff

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** Big thanks to Kev Rowley (07) 3814 4674 for Nissan/Datsun conversions & all engine wiring needs **

DATSUN 120Y SEDAN RB20 AUTO - 11.08 @ 118.45 MPH

1971 Bluebird 510 1800SSS coupe



1997 RPS13 180SX SR20DET, standard internals, 10K Km old (cost me $1400)
GT2871R 52 trim turbo (0.64 rear)
S15 injectors
Z32 AFM
Walbro GSS342 in tank EFI pump
Cat converter, resonator, muffler
Unifilter Ram Pod in DIY airbox
PLMS Developments remapped S13 factory ECU
219.7rwkw (295HP) 17 PSI boost



More info on the Datsun Bluebird .Com Registry

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SR20DET 1971 Datsun Bluebird 1800SSS Coupe - 11.58 @ 122.40 MPH 18PSI GT2871R and PLMS NIStune
Historic 1971 Datsun 1600 Wagon - L series nostalgia
Historic 1967 Datsun 1000 Wagon - A series resto

G'day Guy's

I've just joined up, and was checking this thread out. It looks like 100 RWKW is the magic number for a N/A L20?? would this be around 180hp at the flywheel? and what would you expect a really serious n/a L20 to make 110-115 ?????

Thanks

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go the rat