Rolling Road and 89 MX-5

[Irish]

So, took my £1,700 MX-5 to Vixpy's Surrey Rolling Road at the weekend.

The car left japan 18 years ago with 115BHP..........and 18 year later still has 111.5BHP.

I was simply stunned.

A

[MX-5 Lazza]

That's a very good result
I've been to SRR a number of times and seen quite a few stock MX-5's dyno's and never seen one get that close to the Mazda bhp figure. The worst I've seen is a 1.8 that only made 99bhp (and no, it doesn't have any mechanical faults).

SRR seem to be relatively pessimistic with their results - you would probably gain at least 5bhp at another rolling road but I reckon SRR gives the most accurate readings.

[Herman Toothrot]

now just need a turbo kit

[MX-5 Lazza]

Or a Supercharger

(the car has been improved since this run with bigger injectors, eManage WB O2 and a bigger crank pulley so curve should be smoother and go a lot higher - estimate 235-240bhp)

[Combover]

Herman Toothrot said:

now just need a turbo kit

Bloody hell! How do you manage that without some serious lag?

Bet it loads of fun though!

[Herman Toothrot]

power delivery is good Its can hit full boost by 4500rpm so starts to take of at the same point an n/a engine does its in positive pressure from 2000rpm, notice it make more power at 4000rpm than total peak power of a stock n/a and the torques, well thats more than peak n/a torque at 2500rpm

Edited by Herman Toothrot on Friday 26th October 12:49

[Toecutter]

Herman,


From the Rolling Road Printout the car owner is Steve Bowen

Do I take it you own Steve B's Turbo'd Eunos??

Tim

[Herman Toothrot]

Toecutter said:

Herman,


From the Rolling Road Printout the car owner is Steve Bowen

Do I take it you own Steve B's Turbo'd Eunos??

Tim

I am one and the same.

[anonymous-user]

Steve, are you on a stock / refreshed / built bottom end at that power? Head work? Which turbo?

Sorry to throw the questions at you, but I should be picking up my FM kit from Phil soon to attempt to hammer and jemmy into place.

[Herman Toothrot]

LexSport said:

Steve, are you on a stock / refreshed / built bottom end at that power? Head work? Which turbo?

Sorry to throw the questions at you, but I should be picking up my FM kit from Phil soon to attempt to hammer and jemmy into place.

Stock head and bottomend just bolted on the BEGI kit, GT2860RS

[anonymous-user]

Cheers Steve. And sorry to the OP for the OT. Mine's only a GT2560 on a standard Mk1 bottom end with a Mk2 head so won't see those peak figures. Somewhere in the depths of my memory I seem to recall mention of you being fairly local to me (Oxford) - if so, it might be interesting to compare and contrast your BEGI with my FM one of these days.

[Irish]

LexSport said:

Cheers Steve. And sorry to the OP for the OT. Mine's only a GT2560 on a standard Mk1 bottom end with a Mk2 head so won't see those peak figures. Somewhere in the depths of my memory I seem to recall mention of you being fairly local to me (Oxford) - if so, it might be interesting to compare and contrast your BEGI with my FM one of these days.

...and the car that started all this is now for sale:
http://www.pistonheads.co.uk/sales/277733.htm