A&Q about 350Z
Q:
My Engine Spec is as follows:
2.0 16V, 9A, KR cams, TSR Pack A Head, TSR Exhaust Manifold, Large Ported Inlet Manifold, K&N, Jetex Exhaust System.
Debate:
I know there has been alot said recently obout GVK's problems with 268/276 cams.
Does anyone have any rolling road/dyno plots of any engines with 268/276 or 276/276 Cams - Barny, Matt D???
I'm really after info of where and what the engine would make peak Torque and Power and just as importantly what the shape of the torque/Power plot looks like.
I am really trying to decide which road to go down.
Cheers in advance.
BTW my current plot is a very nice shape - both power and torque. Makes 155.2 lb ft Torque and 180 BHP (@ Stealth when 24 degrees) currently.
A:
do a search matey all the stuff is on here soemwhere
Also check gvk's web page think there plots an stuff on there
A:
Cheers mate,
Looked on GVK's website and 268/276's look like the best route for me as at the moment its got to be good as a daily driver and as a track car 1/2 times a month?
A:
speak to gvk - he tried the 276/268 route and it can and does produce a good all round package ... but ...
not always as easy
A:
As said in that mammoth thread, I too saw the plots from Matt and Ians car and shelled out the cash for the Schrick 268/276 - Sadly I didn't get the results I was hoping for
Yes, there might be other parts/knowledge required to get these results but I didn't have the time or money to find out TBH.
Up to you really.
A:
RobT's on 276s IIRC. Plots of that before and after bodies installed too.
A:
Nurburgring
You've probably seen Gary's web site and it gives good overlays of power and torque graphs btween mine MattD's and Gary's etc.
The subject has been debated alot on here.
As Gary said his car missing a few essential parts to give it the edge but essentially his set up was very good before the head and cams went on.
This cam combination was initially experimented in the States by some guru and although nothing radical it seemed to produce good results over there.
I was initially going for straight 276's.
I tried them in mine after getting them from Badger 5.
Although my car posted good power consistently I also found the power to be linear and torque was excellent throughout the rev range.
My car's figures have now been bettered in other people's cars using these cams.
What you will need is a 50mm inlet manifold a good 2.5 inch exhaust mated to the manifold and expert set up using a Vernier Pulley.
It will be useful for you to get your fuelling checked by Stealth or TSR and get the WUR mod done as that also benefitted my car.
If you have an alarm consider it doesn't impinge on the fuel delivery from the pump where voltage drops are common...also check the lift pump still works.
I've got to start again with the MKIV but I am carefully considering it as a road car foremost so I won't be going for big power.
I hope for 250-280hp using either an IHI or modded APR K04 using a hybrid manifold then using a diff on the standard box.
Should be just about enough for the odd trackday
Ian
A:
There are also some fruity cams available >>
Split durations, split the other way.
partnr.
duration
duration
maximum lift
lift at TDC
parts
application
[data link]
[0.1mm+cl]
[1.0mm+cl]
[cl=0]
[cl=0]
[-]
[-]
7661202
250 / 257°
211 / 219°
9.55 / 10.15mm
0.55 / 0.95mm
O.E.M.
HYDR: O.E.M.
7661207
260 / 260°
219 / 219°
11.20 / 11.20mm
0.90 / 1.00mm
O.E.M.
HYDR: sport
7661206
260 / 260°
224 / 219°
11.60 / 11.20mm
1.25 / 1.00mm
O.E.M.
HYDR: sport
7661210
265 / 262°
227 / 228°
10.90 / 10.90mm
1.35 / 1.30mm
O.E.M.
HYDR: sport
7661215
283 / 267°
246 / 232°
11.50 / 11.45mm
2.55 / 1.70mm
O.E.M.
HYDR: sport
7661235
275 / 275°
236 / 236°
11.15 / 11.15mm
1.95 / 1.85mm
O.E.M.
HYDR: rally & cross
7661221
283 / 279°
246 / 242°
11.50 / 11.50mm
2.85 / 2.55mm
O.E.M.
HYDR: rally & cross
7671125
270 / 270°
241 / 241°
12.00 / 12.00mm
2.85 / 2.95mm
custom
MECH: rally & cross
7671149
287 / 279°
260 / 252°
12.50 / 11.95mm
4.05 / 3.55mm
custom
MECH: rally & cross
7671157
282 / 270°
254 / 241°
13.20 / 12.00mm
4.05 / 3.20mm
custom
MECH: rally & race
7671111
282 / 282°
254 / 254°
13.20 / 13.20mm
4.05 / 4.05mm
custom
MECH: rally & race
7671167
288 / 280°
261 / 253°
13.95 / 13.20mm
4.60 / 4.15mm
custom
MECH: rally & race
7671150
312 / 303°
276 / 266°
13.60 / 12.95mm
5.45 / 4.85mm
custom
MECH: rally & race
7671148
306 / 298°
277 / 270°
13.60 / 13.00mm
6.15 / 5.50mm
custom
MECH: rally & race
custom grinds are available on request
Edited by: badger-bill
A:
Lots of interesting cam specs there from cat cams, i've seen some of their billet cams and they are pretty nice looking
Ian, your cars figures may have been bettered but it's not by a great deal is it ?
Dad said he enjoyed driving your car the other night, he commented that it was one of the nicest Golfs he's ever driven
A:
Something that hasn't been mentioned is compression ratio. Going back a few years me and a friend both had 2 litre 16v motors: 9A block, early head ported by same people, 276 Schrick cams,BRM 4-1, Jetex rally 2 1/2" system, twin 45's. His had standard pistons, mine had forged JE's with 11.8:1 CR. HUGE difference. More power and torque everywhere and nothing like as peaky. On the rollers it made 18bhp more. Another friend had the same motor (std pistons) with 268 cams and that was actually peakier than the 276 cammed motor. No experience of the combo.
A:
You'd have probably made more if you got it to more like 11:1 if you were using pump fuel, as you wouldn't have to retard ignition so much.
A:
Interesting info re custom pistons...not that's debated very often.
MadMK4.........glad to see your dad liked driving my car...but...who said he could drive it though...I didn't !!
I'll speaking
Ian
A:
Cheers for the info guys.
Ian - Have got a 50mm inlet manifold and WUR Mod done. I think i do need to get the section of exhaust pipe between the end of the TSR 4 branch manifold and the front box increased to 2 1/2 as at he moment its a restriction. The exhaust is a Jetex 2 1/2" by the way. Thanks Ian.
Bill - Thanks for the possible cam profiles. Definately worth looking into for developing my engine, cheers.
Oh yeah thought i'd add my current dyno plots (JPEG Images) of my engine for you to view/make comments - but don't know how to do it? Do i have to put it on a web page?
Cheers for your help so far and sorry to repeat a topic of debate.
A:
Nurburgring
Yes mine has a flowed/polished 50mm inlet manifold and it has had the WUR completed
I have a Remus 2.5 exhaust which fits really well straight onto a the TSR/Magnex manifold.
Lots of choice with those cams Bill
Ian
A:
what profile would be better for itbs on a 2L block
A:
Interesting info re custom pistons...not that's debated very often.
Well assuming Ian gets back from checking his cars not been nicked!
As you know im more than chuffed with my JE HC jobbies, tho im on stock cams & clearance wise they 'may' restrict lairy cam use, so would need to get that checked out.
A 9a block, flowed head, 268/276, & HC pistons, big inlet/ exhaust & proper set up 'could' produce a lovely combination, but then again who knows? may need TBs or at the least- a piggyback unichip to allow correct fueling tho. Defo as standard K jet fueling it has to be set up to run cooler water/oil temps anyway.
Hasnt RobT got HC pistons in his ibiza tho?
A:
.
MadMK4.........glad to see your dad liked driving my car...but...who said he could drive it though...I didn't !!
I'll speaking
Ian
id go nuts if i found out someone had been driving my car without my consent!!
268 /276`s are a very good combination retaining torque and increasing peak power, best bet on a 2 litre though, those of you concideing them for a 1.8 may not get such pleasant results,
These cams need as mentioned a flowed head,large inlet manifold, 4 branch and a 60mm exhaust to work properly, plus adequate fuelling set up to match,,,
A:
Hasnt RobT got HC pistons in his ibiza tho?
Yup, JE jobbies, 12 and a bit:1 CR - pockets machined special for big lift cams
Rob
A:
Well there is nothing wrong with the torque figure...
From the top of my head most of the "tuned" 2L valvers make between 150-160lbs/ft peak @ Stealth..
Maybe a smidge more top end is available from cams/higher C.R?
Im assuming the fuelling/ignition has been set up by Vince as you have Stealth figures...
Happy enough with my car now ive tweaked the cam timing & have got it revving cleanly to 7600 for track work..
A:
Hasnt RobT got HC pistons in his ibiza tho?
Yup, JE jobbies, 12 and a bit:1 CR - pockets machined special for big lift cams
Rob
Hmm we may actually have the same pistons then, as mine= same bore diam as 2.0l so they should fit & mine 12.somat :1 area also.
Did you run the lairy cams (276/276?) with the HC pistons on K-jet at all?
Cheers
Edited by: iguana
A:
276/276 are not lairy cams - but no I didn't run them with the high CR
pistons and never on kjet
A:
276/276 are not lairy cams - but no I didn't run them with the high CR
pistons and never on kjet
Ok 276 is not that lairy, more so than boggo KRs tho!
So if its not top secret sprint info, what cams do you currently have with the HC pistons?
A:
steel billet ones from Cat cams in Belgium
A:
what power range would they both kick in at
A:
seems like I have a lot to learn about cams and heads and stuff!
a lot of good info here, but I am looking for subtitles while reading it.
I have a few questions, but let me start by saying I have a 89 gti with the stock 1.8l 16v head but the block has been swapped out with a 9a 2.0l. the Previous previous owner did this, and also installed a "euro intake cam".
what "size" is the euro intake cam? what size is the intake manifold? 40mm? 42mm? 50?
I race rallycross (newbie) and I have a fully custom gearbox that gives me massive amounts of torque in second gear. I like how the 16v engine gives me all the torque I need at low rpms right up to the 7200rpm rev limiter.
I would like to see about getting more out of this engine, but I dont know where to start. - it would help if I knew exactly what I had in it, and what all of these terms you guys all keep using.
is there a glossary with an explanation of terms around? :)
forgive me for being so green. I learn really fast, but I need to start somewhere.