I had a Haltech Interceptor installed in the P38A by Graeme Cooper's on Friday and the vehicle was dynoed to tune it up.

The results were disappointing in comparison to the results obtained by Remy, especially considering my engine has had a fair bit spent on it to improve power, i.e., HC pistons, new cam, worked heads, ported, valves de-shrouded, full balance, etc. This work was only done 15,000km ago so the engine isn't worn out.

Mine is about 20kw down on power cf. Remy's P38A. Mine is very flat in HP - not peaky at all.

Who else has had their vehicle dynoed and has results I can look at. I'm plotting Remy's and my results onto an Excel spreadsheet for comparison purposes. They can't be directly compared owing to different scaling on the graphs.

If I can get some other graphs, I'll plot them as well.

These are mine, before and after for LPG and Petrol:

http://p38arover.com/rover/p38a/P38A_Dyno_LPG_w.jpg

http://p38arover.com/rover/p38a/P38A_Dyno_Petrol_w.jpg

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Ron B.

1995 P38A Range Rover HSE 4.6 V8 Auto; 1968 LR Series IIA trayback (Holden 202); Yamaha XJR1300, Suzuki DL650 V-Strom



RIP Bucko - Riding on Forever

Are the results from the same Dyno? same day? Ambient air temp and humidity? tyre size and type?..............if not, then comparing figures is aimless

Its all about seat of your pants

A dyno is a tuning tool

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"There is a good idea in the bottom of every bottle"....Jack Daniels

Same dyno. Same gear. Same type of car. Same calibration date. Same type of ECU upgrade, both Haltech Interceptors.

Months apart and 25kw difference.

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Ron B.

1995 P38A Range Rover HSE 4.6 V8 Auto; 1968 LR Series IIA trayback (Holden 202); Yamaha XJR1300, Suzuki DL650 V-Strom



RIP Bucko - Riding on Forever

I would be a little upset too,my Tdi is just under that.My 3.9 had 72hp at the wheels and it was factory stock. Pat

Ward at GC thinks I may have clogged cats.

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Ron B.

1995 P38A Range Rover HSE 4.6 V8 Auto; 1968 LR Series IIA trayback (Holden 202); Yamaha XJR1300, Suzuki DL650 V-Strom



RIP Bucko - Riding on Forever

with results like that there has to be something wrong, clogged cats could be it, i had a melted cat in my old commodore, bashed the guts out of it and it drove like a new car

I would love to dyno my county, but it wont be happening till its got a gen3 in it!

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I'm thing of doing the same thing! Not that I'd do anything illegal!

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Ron B.

1995 P38A Range Rover HSE 4.6 V8 Auto; 1968 LR Series IIA trayback (Holden 202); Yamaha XJR1300, Suzuki DL650 V-Strom



RIP Bucko - Riding on Forever

Pat303 wrote,...My 3.9 had 72hp at the wheels and it was factory stock.

72hp is only 54kW.

Maybe you should fit some new cats.

Ron.

Is it illegal to make custom home made high flow cats? i didnt know that

The other option, you can pick up cheap highflow cats 2-2.5in diameter magnaflow brad for about 120 each, i was goin to be getting some from a guy who sells on another forum, he has an online store, tuffcarparts.com.au i think it was...

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Thanks for that Cal.

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Ron B.

1995 P38A Range Rover HSE 4.6 V8 Auto; 1968 LR Series IIA trayback (Holden 202); Yamaha XJR1300, Suzuki DL650 V-Strom



RIP Bucko - Riding on Forever