How much power can one expect to gain from 2.8 stroker?
10-14-2008, 10:53 PM
#46
Rennlist Member
Thread Starter
I know, its a great price. Im still very tempted. Thing is I could do the coilovers, and new paint, with all new seals trim, etc for about just what the stroker would run me. Do I soup it up now, then spend more, on paint, and maybe suspension making the final bill go up? Or do I just rebuild, paint, do suspension, and be done with it? Hmmmm....tough decision.
10-14-2008, 11:11 PM
#47
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
This may give you some insight even though it is a bit old. It is from a very creditable source if you didn't know that too. Post #4. Or, you can convert and go to the dark side as hp18racer seems to be keen on, and dump a V8 in the car!
https://rennlist.com/forums/showthre...e+shaft+delete
https://rennlist.com/forums/showthre...e+shaft+delete
10-14-2008, 11:13 PM
#48
Drifting
Join Date: May 2006
Location: Melbourne
Posts: 3,481
Likes: 0
Received 0 Likes
on
0 Posts
seems to me a tight **** 968/S2 turbo motor is far more cost effective . a motor showing OK compression 3 grand comtec fat gasket 200? fabricated inlet manifold 500 to 1500 and crossover modified 200.
and don't say stand alone again now one will trade anything for mine .
and don't say stand alone again now one will trade anything for mine .
10-14-2008, 11:16 PM
#49
Rennlist Member
Im kinda leaning torwards suspension, and fresh paint more, and more. More power without turning up the boost is nice, but boost is intoxicating. Maybe I should just get this done, and not spend the extra cash. Then I can focus on a 968 sooner, rather than later. Hmmmm, makes me wonder if bore and stroking the 2.5 uses the 3.0 crank, what do you use when you bore and stroke the 968 3.0? Seems like the 968 block would be beefier, and more ideal for boring.
10-14-2008, 11:17 PM
#50
Addict
Rennlist Member
Rennlist Member
I remember talking to a well known builder here on the list and he advised to go bore over stroke claiming that stroked 2.8s are more prone to detonation and stroking increases stress at higher RPMs. He also said that torque gains were minimal at a set boost level.
Off topic...I was looking at a 3.0L block the other day. How come we don't hear a lot about #2 rod bearing failure on 3.0L? It can't be the oil squirters, oiling is the same, coolers are almost identical; what about the little windage port on the 3.0L blocks? Could that have enough positive effect on the oil to aid that much?
10-14-2008, 11:36 PM
#51
Drifting
Join Date: May 2006
Location: Melbourne
Posts: 3,481
Likes: 0
Received 0 Likes
on
0 Posts
well the cooler on a 3.0 is bigger most 3.0's don't have turbos so generally the oil temp will be less.
can you be more specific about the wind age port ?and when the oiling thread was done the experienced guys said watch the temps
do you mean the big widows' between bores ?
legend has it that there was a pumping effect in the crack case reducing oil return so windows were cut to equalize under 1/2 and 3/4
can you be more specific about the wind age port ?and when the oiling thread was done the experienced guys said watch the temps
do you mean the big widows' between bores ?
legend has it that there was a pumping effect in the crack case reducing oil return so windows were cut to equalize under 1/2 and 3/4
10-15-2008, 01:57 AM
#52
Rennlist Member
12% more displacement is 12% more power potential. I did the 2.8 on my car. I couldn't stand to spend the money on a new motor and not get something 'better'. It's a turbo car, the rush is in the boost. Compared to the low end torque of a V8, a 2.8 is still lame. If I had it to do again I'd have spent the money elsewhere.
Interesting. My 3L exceeded my expectations -- would do it again for sure.
My motor at 22psi feels anything but lame.
10-15-2008, 02:26 AM
#53
Monkeys Removed by Request
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Guys with 1k in mods to a 6ltr will make your power with more tq and a much better daily driver friendly powerband.
Not to mention they will take a beating again and again. Its just a personal choice.
10-15-2008, 03:22 AM
#54
Rennlist Member
That's one view and entitled to it. However, before Chris took on 996 and 997, he was the best at 2.8L. I have his article/post and the excellent reference he had for stroking the engine, as long as you stayed within guidelines of the build. He ran the engines on the track, without detonation or failure. I'll post up about it if I can get may ancient scanner to work. Having seen Jim's 2.8L, driven the $hit out if myself with the VR IV kit, AND cold A/C, the only thing more you could ask for is a 3.0L. For the $$ invested, a 2.8 is a great way to get power. % are all relative to the hp present and boost levels, then you can add more hp by the clearance, lighweight assemblies, delete certian parts, etc.
Off topic...I was looking at a 3.0L block the other day. How come we don't hear a lot about #2 rod bearing failure on 3.0L? It can't be the oil squirters, oiling is the same, coolers are almost identical; what about the little windage port on the 3.0L blocks? Could that have enough positive effect on the oil to aid that much?
Off topic...I was looking at a 3.0L block the other day. How come we don't hear a lot about #2 rod bearing failure on 3.0L? It can't be the oil squirters, oiling is the same, coolers are almost identical; what about the little windage port on the 3.0L blocks? Could that have enough positive effect on the oil to aid that much?
10-15-2008, 03:26 AM
#55
Rennlist Member
I would agree. Even though I haven't come up against a V8 conversion nor am I likely, I can't imagine something leaving a well sorted 3L turbo in it's wake. A lot of these V8 guys talk about similar hp figures as ours too. Sure if you want to put a couple of turbos on as well, then that's a different story, but lets stick to n/a V8 vs big bore turbo.
10-15-2008, 03:56 PM
#56
Rennlist Member
Thread Starter
A search for "kw" or "kw v3" brings back nothing. Im curious how this suspension rides. It will be about a 99% street car. A certain degree of comfort would be nice.
10-15-2008, 04:08 PM
#57
Rennlist Member
Raj
10-15-2008, 04:16 PM
#58
The Impaler
Rennlist Member
Rennlist Member
The threads are there... keep searching. Make sure you have it set to search the entire thread, not just the title..
10-15-2008, 04:38 PM
#59
Rennlist Member
Thread Starter
10-15-2008, 05:43 PM
#60
It's just not a big difference b/t 2.5 and 2.8. A well tuned 2.5 or 2.8 at high boost is a blast. A 2.8 is significantly more money for incrementally more power. The fun of my 2.8 car is not low end torque off the line, it is the CRAZY feel of big turbo where the faster you go the harder it pulls.
If I had it to do again I'd have done a 2.5 and spent the difference on other stuff, like say a VR setup. Two more pounds of boost on a 2.5 nearly makes up the displacement difference. If you want the ultimate 944 and price is not a constraint, 2.8 or even 3.0L is the way to go.
If you want the ultimate hybrid, do the V8 like TonyG
If I had it to do again I'd have done a 2.5 and spent the difference on other stuff, like say a VR setup. Two more pounds of boost on a 2.5 nearly makes up the displacement difference. If you want the ultimate 944 and price is not a constraint, 2.8 or even 3.0L is the way to go.
If you want the ultimate hybrid, do the V8 like TonyG