cjh1981
Advanced Member
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- 563
All taken form their facebook page:
https://www.facebook.com/TDiNorth
Testing with Spoon Europe.
Yesterday we were lucky enough to
have Spoon Europe's DC5 demo car in for mapping and to carry out some
trials on their drop in K20 cams.
We ran the car with stock JDM cams to start with then proceeded to remap the car with a Hondata ecu.
Specification is as follows:
Stock DC5 airbox, Spoon throttle body, Stock PRC intake manifold, Spoon 4-2 and 2-1 manifold, Spoon N1 catback
Once completed we carried out a cam change and remapped to suit the new setup.
What we discovered took us a bit by suprise but when you realise that
these cams were developed 10 years ago when mappable ECUs weren't
available and when supplied with Spoon refreshed ECUs to extract best
out of them which is similar to what Mugen and Toda were also doing at
the time with all the N1 racing it all makes sense.
The results when compared with the JDM cams mapped to the car did show gains but only after 8000rpm.
If you had an increased limiter to say 9000, then with vtec at 5500 you
have a cam profile ideally suited to high revving track racing compared
to the more midrange punchy JDM cams that peak at lower rpm.
The Spoon cams have less lift compared to the JDMs and other aftermarket
cams possibly to protect the motors if running at higher rpm and reduce
the risk of valve float and again this gives a good indication of the
reduced output compared to the JDMs.
To drive the car actually felt a lot more responsive than with the JDMs and pulls very strong right to the limiter.
Best comparisin I could give would be that it was like driving a car with Skunk2 cams in the way they pulled hard at high rpm.
It would have been nice to see the curve running to 9000rpm but I
wouldn't want to push a customers car past the 8600 limiter even though
it would have probably been ok to do for a single pull.
(Spoon cams are the solid line on the dyno plot)
Solid line is the Spoon cams, Dotted line is the JDM cams. Both fully tuned on Hondata ECU.
Spoon cams clearly making gains after the JDM's drop off from 8000rpm
and an increased limiter to 9000 would have shown healthy gains at peak.
In summary an ideal circuit high rpm race cam in their day where
mappable ecu's, uprated valvetrains weren't available or allowed
https://www.facebook.com/TDiNorth
Testing with Spoon Europe.
Yesterday we were lucky enough to
have Spoon Europe's DC5 demo car in for mapping and to carry out some
trials on their drop in K20 cams.
We ran the car with stock JDM cams to start with then proceeded to remap the car with a Hondata ecu.
Specification is as follows:
Stock DC5 airbox, Spoon throttle body, Stock PRC intake manifold, Spoon 4-2 and 2-1 manifold, Spoon N1 catback
Once completed we carried out a cam change and remapped to suit the new setup.
What we discovered took us a bit by suprise but when you realise that
these cams were developed 10 years ago when mappable ECUs weren't
available and when supplied with Spoon refreshed ECUs to extract best
out of them which is similar to what Mugen and Toda were also doing at
the time with all the N1 racing it all makes sense.
The results when compared with the JDM cams mapped to the car did show gains but only after 8000rpm.
If you had an increased limiter to say 9000, then with vtec at 5500 you
have a cam profile ideally suited to high revving track racing compared
to the more midrange punchy JDM cams that peak at lower rpm.
The Spoon cams have less lift compared to the JDMs and other aftermarket
cams possibly to protect the motors if running at higher rpm and reduce
the risk of valve float and again this gives a good indication of the
reduced output compared to the JDMs.
To drive the car actually felt a lot more responsive than with the JDMs and pulls very strong right to the limiter.
Best comparisin I could give would be that it was like driving a car with Skunk2 cams in the way they pulled hard at high rpm.
It would have been nice to see the curve running to 9000rpm but I
wouldn't want to push a customers car past the 8600 limiter even though
it would have probably been ok to do for a single pull.
(Spoon cams are the solid line on the dyno plot)
Solid line is the Spoon cams, Dotted line is the JDM cams. Both fully tuned on Hondata ECU.
Spoon cams clearly making gains after the JDM's drop off from 8000rpm
and an increased limiter to 9000 would have shown healthy gains at peak.
In summary an ideal circuit high rpm race cam in their day where
mappable ecu's, uprated valvetrains weren't available or allowed
