[roland2003]

Hi guys, just an observation regarding 30-70 times Ive made over the past few weeks. Early gearbox is about 0.5-0.6 seconds slower than a late car with its lower gearing. (based on a selection of cars with 220 ish bhp). Also remmember to mash the gas at 20mph and start the clock at 30mph like 1320 do.
Best Regards Roland GTT

[Aberdeen Al]

[quote=roland2003;3229241Also remmember to mash the gas at 20mph and start the clock at 30mph like 1320 do[/quote]

Alternatively you can sit at 30mph then "mash the gas" like I and some others did!

[lucachiarelli]

I started at 30 also. Might try a run from 20 and see if it makes any difference.

[roland2003]

Yes, if you mash the gas at 30mph youll get a worse time than mashing it at 20mph.
Best Regards Roland GTT

[Richard Crofts]

Theres a few people recomending mods for Snowie, I think they have missed the point. Snowie is looking to keep the engine bay as standard as possible. Thats why he still runs a works airbox and GP intercooler. Now the Works box with GTT hybrid is actually very good IMO. Plus Snowie says that he is finding the GP IC pretty reasonable to...I am running a GP IC on my -15% car with modded bypass valve and the inlet and outlet horns on my car are bloody ice cold even on milder days, especially after fitting a modified M7 hoodscoop! My Stock IC would be hot beyond belief after only a few minutes even on a cold day! Thus Snowie is unlikely to be loosing much there, his main issue is probably that very high BP reading off the JCW exhaust....Custom all the way to the rear is probably the only thing to do and have powerflow weld the JCW final piece onto the custom sections nearer the front, or get them to do something totally custom that can still have the JCW tails fitted onto it.

[Rigsey]

Quote: Originally Posted by Richard Crofts (original)

Theres a few people recomending mods for Snowie, I think they have missed the point. Snowie is looking to keep the engine bay as standard as possible. Thats why he still runs a works airbox and GP intercooler. Now the Works box with GTT hybrid is actually very good IMO. Plus Snowie says that he is finding the GP IC pretty reasonable to...I am running a GP IC on my -15% car with modded bypass valve and the inlet and outlet horns on my car are bloody ice cold even on milder days, especially after fitting a modified M7 hoodscoop! My Stock IC would be hot beyond belief after only a few minutes even on a cold day! Thus Snowie is unlikely to be loosing much there, his main issue is probably that very high BP reading off the JCW exhaust....Custom all the way to the rear is probably the only thing to do and have powerflow weld the JCW final piece onto the custom sections nearer the front, or get them to do something totally custom that can still have the JCW tails fitted onto it.

I agree to certain extent ... but if you have changed as much as Snowie has i.e. head, manifold, etc you may as well change the IC (if there is benefit to be had over the GP IC; which I cannot confirm) as its easily changed back for the stock look

Snowie mentioned that he was going to try another IC during Saturday's rolling road session; I think we'll get our answer then.

My money is still on the exhaust

[alski]

can you not buy miltec kit in sections?,
ie do not buy 1st cat back section, then "new" mid pipe
then get an independent to do a special with your existing tips to keep OEM from behind

[Snowie]

Quote: Originally Posted by alski (original)

can you not buy miltec kit in sections?,
ie do not buy 1st cat back section, then "new" mid pipe
then get an independent to do a special with your existing tips to keep OEM from behind

Under investigation as there are a couple of issues -
Having the JCM Mainifold and sports cat repostions everything before the flat Y piece backwards by about 600 mm
Miltek is larger bore than JCW

[Hyper Active]

Quote: Originally Posted by Snowie (original)

The mods and dyno runs
Run 1 is fully at stock to set the base line
Run 2 is with GTT + 3% crank, GTT Hybrid filter and GTT tensioner mod and pulleys, boost gauge.
Run 3 down to Minimotorsport center for Tony Franks to fit JCM 4-2-1 sports manifold and sports cat. This is from the JCW 225 pack.
Run 4 is back down to GTT for Stage 4 cylinder head, Shrick valves, Shrick high lift cam, AFPR, 450cc injectors, modified bypass valve.
Run 5 GTT - 15% SC pulley, shorter sticky belt and AFPR adjustments to resolve stumble on pull away - remember this is one of the first cars to have AFPR some some tweaking was envisaged.

I see from your opening post that between dyno run 3 and 4, you had something called AFPR fitted.

Can you tell me what these letters stand for , what AFPR actually does. Thanks.

[Loui]

Quote: Originally Posted by Hyper Active (original)

I see from your opening post that between dyno run 3 and 4, you had something called AFPR fitted.

Can you tell me what these letters stand for , what AFPR actually does. Thanks.

Adjustable fuel pressure regulator

[BRMCooper]

Quote: Originally Posted by roland2003 (original)

Yes, if you mash the gas at 30mph youll get a worse time than mashing it at 20mph.
Best Regards Roland GTT

done that and saw pretty much no difference in time prob .1 over 4 runs

[GT4 Baz]

Hi guys.

Since its a pretty simple job, couldn't one of the GRS owners simply swap IC's with the GP owner and do a run before and after?

This would be one way to settle it!

I also think the fuel air ratio is too rich going by your dyno chart print out (says the man with a dirty jap car that runs rich as you like! ) so a custom remap could help out here.

Have you checked your timing too? With that much fuel there might be room for a bit of advance to gain you a few more bhp.

Very good work on the stage by stage mods though mate, well done!

[Snowie]

I C swap taking place on Saturday during Surrey Dyno day run - this should settle one of the debates.

Custom map is also on the cards

[roland2003]

I think Alans car may benrfit from a bit more advance. Remmembe fuelling will be richer on the RR than on a real road. You need to set up fuelling & ignition on the road.
Best Regrds Roland GTT

[Loui]

Quote: Originally Posted by roland2003 (original)

I think Alans car may benrfit from a bit more advance. Remmembe fuelling will be richer on the RR than on a real road. You need to set up fuelling & ignition on the road.
Best Regrds Roland GTT

Thats funny when i was talking to one of the big jap specialists recently they said they dont bother setting up on the road only on their Dyna pack now???
An these guys setup 600 + HP skylines etc

[Lucky Dave]

Having just been on the dyno today and then on the road I can 100% confirm the fueling will be different for each.

On the rollers my A/F was up and down all over the place, but on the real road its as smooth as you like!

As with all things tuning wise, we will never stop and the car will never be finished! so for now im tuning for winter!

[roland2003]

As Dave says and found out ,fuelling is different on the RR than the real road. Ignition timing requirements (ie onset of pinking) even more so.
Best Regards Roland GTT

[GRSmotorsport]

Think Snowie was very happy with todays rolling road results!!!

[Snowie]

Just come back in from Surrey Dyno day using the same RR as I have used for all mods.

Today was B..... Cold so ideal for RR sessions

Max 251.8 BHP with 211.7 at the wheels 4 runs all within 1 BHP

Same power results with both GP and GRS intercoolers

Boost is up with GRS cooler, this is also noticeable on the road as traction control trips in 3rd with GRS but with GP only does this in 4th. Also verified with the boost gauge - if you can keep your eye on it whilst giving the car a good blast and hanging on to the wheel

On such a cold day no measureable differenece in BHP but most likely on a hot day the GRS IC will be better than the GP IC

I will update the first post with runs 6 and 7 later tonight

Alan

[lucachiarelli]

Well done mate those are some good results