GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: MackyM on 21 April 2006, 22:52
-
Does a cam upgrade always compromise torque to achieve more power - not to mention low rev drivability? Is there a cam which increases torque and power or is such a thing impossible?
-
I'm afraid so, you cant have both. This is what the V-Tec system is for on jap boxes, it tries to give the best of both worlds. low down drivability but you can rev the tits off it if you feel like it ;)
Best way to go is a larger capacity bottom end combined with a cam :)
-
i brought a gs2h kent cam with a vernier... when dialed in with correct ign timing it shows good gains, but as said with a 2.0l bottom end too it'l be a flyer
-
I'm afraid so, you cant have both. This is what the V-Tec system is for on jap boxes, it tries to give the best of both worlds. low down drivability but you can rev the tits off it if you feel like it ;)
Best way to go is a larger capacity bottom end combined with a cam :)
With only partial success - my Civic VTi and Accord Type R were both fliers, but there wasn't much flexibility (in fact the civic had none at all). I am having the 2.0 bottom end I think - but having done a search on here it seems you need to worry about oil pumps and uprated valves, etc. to support the cam upgrade (cams - mine is 16V). I guess I stick to the bigger lump and get it properly set up on a RR. With an exhaust and filter I reckon it might hit 170 brake? Does that seem unrealistic?
-
I was told by TSR that a valver is good for 180 with ported head, cams and stainless zuast.
add a 2.00 bottom and and you'd be looking at 200!!!
-
Not sure about that rowlers I have a 1.8 16v polished and ported head 4 branch stainless manifold and exhaust, drilled airbox (good for 15bhp :grin: ) and it's 149bhp at the wheels I can't see dropping in a set of cams making it gain 31bhp I was told cams on a valver will make a slight power difference, I find the standard KR cams to be fine not too lumpy on idle and it sits down and launches at 4200 rpm low end driveability is fine.
Mini with race spec engine and some wild cams paddle clutch lsd etc was an absolute b!tch to drive around town or in traffic. when the cams are off it has such a strange idle it sounds like it's going to die at any point!
-
must admit I was sceptical! £149 at the wheel will be good enough for me! :wink:
-
Apparently the 2.0 16v abf will hit 170 with just a new chip, I've been told they were limited from the factory to prevent them hurting VR6 sales!
-
Pardon my ignorance, but if I keep my 16V head and mate it to a 2.0 16V bottom end how can I chip it? I don't have digifant but mechanical injection, so how does changing the lump allow chipping? I was hoping for 170 with standard ecu, 2.0 lump, zorst, filter, and some RR tweaks (I know a genius in that area).
-
you cant chip it , that would invole, swapping to later loom to run mk3 managment , getting rid of the kjet and loads of other stuff.
ive got me 4 banch back on now, with my new ashley exhaust. it ran like crap, so i went out adjusted the dizzy until i heard the dreaded pinking sound then backed it off a bit, ceratinly goes better now. :smiley:
go for the 2.0 bottom end , any 9a or 6a lump will do, get a decent exhaust and 4 branch and take it to ray , let him play with the fuelling and im sure you will be happy. :wink:
i would have thought , 170@ fly on kr head,standard cams with the 9a bottom end and zorst etc ,is achivable.
my ten pence worth
jim
-
Cheers Jim. I think my zorst is OK, a Scorpion stainless, so I can tick that item.
-
get a decent exhaust and 4 branch and take it to ray , let him play with the fuelling
are you talking about Ray from T&M's?
-
That's the man :cool:
-
yes thats him, as far as im concerened he's a god!!! :smiley: , i remember when i had my 8v scirroco gtx, took it to him to get it all set up, had performance cam, stainless zorst and tubular manifold, audi 5 cyl warm up reg , airbox and heat sheild and a healthy 154 @flywheel , not bad from a standard 112bhp.
he always sets his stuff up properly, and if you have a problem somewhere, he'll find it and tell you how to fix it , or fix it for you if he can.
like i said, he is very good.
and the rr doesnt give you over excited figures, as ive also been elsewhere and got within 2 bhp.
jim
-
Yeah you can't chip a K-Jet engine (well you can, there was a K-star chip available, but these are hard to find now). I just meant the 2.0 ABF can reach 170 without any serious engine work, so it should be no problem to do the same with a k-jet 2.0.
-
I guess I stick to the bigger lump and get it properly set up on a RR. With an exhaust and filter I reckon it might hit 170 brake? Does that seem unrealistic?
went to stealth racing with my 2.0L 16v (standard 9a cams, 4-2-1 TSR manifold, full ss exhaust) last week and it got 164.9 bhp (at fly) (120.1bhp at wheels) and 147.1 lbs/ft torque. with KR cams Vince (the guy at stealth) suggested that it would reach around 170-175 bhp.
he said with a 2.0l 16v, p&p head, cam, exhaust, 4-2-1 fannymould you should be expecting a reliable 200bhp at fly. although there will be fluctuation between different rolling roads, conditions etc, of as much as 10%
-
so the question is , does anyone have a source of 9a lumps??? people that no what you want them for want a fortune. :angry:
jim
-
Back to the origional question about cams. Its not necesarily true that you have to sacrifice torque when upgrading your cam. With cams its not all about the degree of the cam! You also have to take into consideration the lift. You often find that cheaper cams even well known brands are re grinds which because they have had material taken off give less lift even though they are now a higher degree of cam. So when looking for cams do your homework and shop around getting details of each product. As always you get what you pay for. Ive just bought a set of fast road schricks. They aint cheap but are the dogs dangilies when it comes to cams. They are a 268 degree cam with a beauty 11.5 lift. The grand total was about £450. Anything with a lift below 10 is worthless and you would be better off with standard cams.
So with my new cams, a ported and gas flowed head from SP Performance, 4 branch stainles manifold and zorst a lightened and ballanced 2 litre bottom end im hoping for around the 200bhp mark. Keep your eyes peeled and i will be back with the evidence when its all done and tuned. :smiley:
-
Very impressive :cool: Where did you find your 2.0 lump mate?
-
I found it on the bottom of my engine :grin:
I bought the car already converted. Altho i am in the process of taking it out. From what i can see its an audi lump marked as 11J and a big old 2.0 stamp :cool:
-
I know an Audi 80 2.0e going for £250 if this has the 9a lump that your folks are looking for???
i'll get the number 2moro if it has the required parts!