Engine has been rebuilt

[v6vn/vpwagon]

Well guys, i finally have my vp engine being rebuilt. I have put in a stage 2 crow cam with memcal upgrade, 20 thou over size acl race pistons, new bearings and seals, and a race gasket set through out.

All i need to do now is work out the exhaust system to get the most out of her. I have extractors and a 21/2 inch system, but i am still trying to figure out the best system. I know i need to source a hi-flow cat, but is after that i am not sure what to do with the intermidate muffler and rear muffler. Should i live them standard or should i put a hot dog in to replace the inter. muffler. Any tips???

[xcop5l]

get a hi flow cat and remove the rear resinator leave the front muffler in. this will give a good flow rate, from what ive experienced this system seems to work the best

[v6vn/vpwagon]

Won't this create two much noise (legally wise)? Or will i get away with it?

[1991_Vn2nV]

Nah normally it will be ok man. A good resonator can give a better sound though. Its just a matter of finding the right one.

[cracker]

trust me straight through middle muffler and a resi 2.5" will sound sick thats what i have on a simular motor with stock cat and headers and its prob the best sounding v6 iv herd

[1991_Vn2nV]

trust me straight through middle muffler and a resi 2.5" will sound sick thats what i have on a simular motor with stock cat and headers and its prob the best sounding v6 iv herd

No offense, but thats because its yours mate. Everyone thinks their own exhaust sounds tuff, and at the end of the day, its completely personal preference.

[cracker]

honestly its pretty shit but havent heard anything better, and few of my mates have v6 commies and they all say it sounds sick none of them can get the same note its louder then my mates vp stocker with a stock middler muffler and pipe and louder then 2.5" with no resi the engine work cam/heads make it sound so much better at 3k it screams.
but i get where ur coming from

[v6vn/vpwagon]

I have been told that i will need A hi-flow cat. What about putting a hotdog in the place of the middle muffler and keeping the rear resonator? I believe that a car still needs some back pressure to run right, but how much flow is to much. And i forgot to mention that i do hve a pod filter to go on this setup so air going in isn' to much of a problem.
Geting the right exhaust system is very important. But finding the right one is becoming fustrating

I will be posting pics soon once i have put the motor in, hopefully by next week

[cracker]

go pacies duel cats blance (h pipe) before the cats in to a single 2.5" with one muffler and a resie. perfect thats what id get if i had the money.

[1991_Vn2nV]

I have been told that i will need A hi-flow cat. What about putting a hotdog in the place of the middle muffler and keeping the rear resonator? I believe that a car still needs some back pressure to run right, but how much flow is to much. And i forgot to mention that i do hve a pod filter to go on this setup so air going in isn' to much of a problem.
Geting the right exhaust system is very important. But finding the right one is becoming fustrating

I will be posting pics soon once i have put the motor in, hopefully by next week

A hot dog is a resonator, so dont replace the centre muffler with a hot dog. Hot dog takes the place of the rear resonator. I'd just get a VS S/C CAI, not a pod mate, unless you atleast get a heat shield for it and a CAI running to it anyway.

As for the cat, nobody NEEDS a hi flow cat... And the internal diameter of a stock cat is 2.5" so it doesnt really need to be upgraded to a hi flow version unless you get a 3" exhaust, otherwise the cost doesn't really justify the change.

[v6vn/vpwagon]

A hot dog is a resonator, so dont replace the centre muffler with a hot dog. Hot dog takes the place of the rear resonator. I'd just get a VS S/C CAI, not a pod mate, unless you atleast get a heat shield for it and a CAI running to it anyway.

As for the cat, nobody NEEDS a hi flow cat... And the internal diameter of a stock cat is 2.5" so it doesnt really need to be upgraded to a hi flow version unless you get a 3" exhaust, otherwise the cost doesn't really justify the change.

I do plan on extending the intake pipe to go to the front of the car to increase the air flow and insure that dosn't take in hot air from the engine bay. I found much better response on a pod filter te the standard CAI. So i will stick with it, i will just have to make same mods.

Just so you guys know i have done all the work myself except for the machining in which case i organised a friend of mine who does race/perfomance engines. All in all this project has been a lot of fun. I defeintly look forward to the next cruise after all this

[1991_Vn2nV]

Can I ask your opinion on the stage 2 crow cam? I was quite disappointed, and the gains to be rather small. I'll be changing cams down the track to something more satisfying I hope.

[v6vn/vpwagon]

I believe its like anything, if you only change the one part then its a waste of money. If went to stage three i would have to do a lot more work to the top end of the motor. in which case i felt that cost would exceed gain. With the stage two i just had the heads cleaned, decked and the valves triple cut and reseated. I stripped the motor down completely so that it was just a block and heads left. I have put new bits and pieces throughout. So far the engine alone has cost me $2000 give or take $100

[1991_Vn2nV]

You should get it on a dyno man, would be great to see some results

What extra work would be needed with the stage 3 cam? I didnt think it required anything other than headers and memcal?

[v6vn/vpwagon]

From what i have heard you would have to change the springs and rockers to suit the stage three. Stage two also needs memcal upgrade. Which you can buy as a kit with the stage two cam. As soon its all done i will take it down to the dyno and hopefully the drags as well to get some times. Not sure when though. Don't forget i also changed the pistons to 20 thou over which should also add to the whole set up.

[v6vn/vpwagon]

I forgot to mention that i also changed the ecu to a vp series two with the memcal upgrade. What real gains did you get with your stage 2 and what mods did you make with it?

[immortality]

upping the compresion when fitting a bigger cam will definitly see better gains then just fittingthe cam alsone. also going to a bigger cam again means moving the power curve of the cam up the rev range requiring you to spin the motor faster so a valve spring upgrade would be good insurance to prevent valve bounce as this is a sure way to quickly destroy your roller followers. looking forward to seeing some results when you get it on the road

[v6vn/vpwagon]

Cheers. I will keep you all posted

[1991_Vn2nV]

I forgot to mention that i also changed the ecu to a vp series two with the memcal upgrade. What real gains did you get with your stage 2 and what mods did you make with it?

I didnt get much gain at all, havent had my car on a dyno or anything so im not sure. I noticed a bit more top end, but nothing like I expected. VP series 2 ecu would be te same as a VN Series 2?

Also you dont need to change the rockers or anything for a stage 3. Keep us updated man

[v6vn/vpwagon]

From what i have heard about the stage three from a few people you have too. Although they could be wrong. Who knows. The VN i have is a series 1, I up graded the ecu to vp series 2 as the motor also came from a vp series 2 as well. More or less to be on the safe side. Not sure if there are any differences really. If someone knows maybe they can let me know (its always handy to have a spare ecu). If they aren't then i guess i can always sell it.

[greenfoam]

Yeah the ecu's are the same, the memcal is slightly different, probably a cheap go fast for a series 2/VP owner, get a VN memcal, slightly lower rev limit but it's a more agressive tune

VN "ATFY" spark map

29.88 49.92 43.95 35.16 31.99 29.88 28.13 28.13 28.13 28.13 28.83<WOT timing at 4800rpm
29.88 49.92 43.95 35.16 31.99 29.88 28.13 28.13 28.13 28.13 28.13
29.88 49.92 43.95 35.16 31.99 29.88 28.13 28.13 28.13 28.13 27.07
29.88 49.92 43.95 35.16 31.99 29.88 28.13 28.13 28.13 28.13 26.02
29.88 54.14 48.16 36.91 31.99 29.88 28.13 28.13 28.13 28.13 24.96
29.88 56.95 45.00 36.91 34.10 33.05 30.94 28.83 28.13 26.02 23.91
29.88 54.84 41.84 36.91 33.05 28.83 28.83 27.07 26.02 22.85 21.09
29.88 48.87 43.95 35.16 31.99 28.83 27.07 26.02 24.96 21.09 18.98
20.04 48.16 45.00 35.16 30.94 28.13 24.96 22.85 21.09 16.17 13.01
20.04 48.16 42.89 30.94 27.07 24.96 22.15 17.93 14.06 9.84 8.09
20.04 40.08 37.97 30.94 27.07 22.85 20.04 16.17 11.95 7.03 4.92
20.04 20.04 20.04 20.04 20.04 15.12 9.84 9.84 5.98 4.92 4.92

VP "BAAM" Spark map

29.88 52.73 34.80 33.05 33.05 30.94 27.77 27.77 27.07 26.02 24.96<WOT timing at 4800rpm
29.88 43.95 31.99 31.99 31.99 29.88 27.77 26.02 26.02 23.91 23.91
29.88 45.00 34.80 31.99 31.99 30.94 28.83 27.07 27.07 26.02 24.96
29.88 40.78 34.80 33.05 33.75 27.07 28.12 23.91 22.15 22.15 22.15
29.88 40.78 34.80 33.75 31.99 26.02 27.07 23.91 22.15 22.15 22.15
29.88 43.95 34.80 31.99 30.94 28.83 27.07 23.91 22.15 22.15 20.04
29.88 45.70 33.75 31.99 29.88 28.83 26.02 22.85 21.09 20.04 18.98
29.88 45.70 34.80 31.99 29.88 26.02 24.96 22.85 20.04 16.87 15.82
20.04 46.76 35.86 30.94 27.07 24.96 22.15 18.98 15.12 14.06 10.90
20.04 34.80 33.05 29.88 26.02 22.85 15.82 13.01 8.79 7.03 4.92
20.04 26.02 34.80 30.94 22.85 21.80 15.12 13.01 9.84 4.92 2.81
20.04 20.04 20.04 20.04 20.04 15.12 9.84 9.84 5.98 4.92 4.92

You can bet that's worth 5 rwkw or so

[1991_Vn2nV]

On the Crow Cam websie it says with any cam you should always replace the lifters, generally the timing chain and fit high performance valve springs (Stage 2-3).

[v6vn/vpwagon]

On the Crow Cam websie it says with any cam you should always replace the lifters, generally the timing chain and fit high performance valve springs (Stage 2-3).

I have replaced the lifters and timing chain but i left the valve springs. I had the head decked, the valves reseated etc... But i didn't worry about the springs. The guys I spoke to said they would be fine since it is only a mild street cam. If they are wrong then i will be spewing. Crow cams could be just segestive selling to make more money (as they do).

[v6vn/vpwagon]

Yeah the ecu's are the same, the memcal is slightly different, probably a cheap go fast for a series 2/VP owner, get a VN memcal, slightly lower rev limit but it's a more agressive tune

VN "ATFY" spark map

29.88 49.92 43.95 35.16 31.99 29.88 28.13 28.13 28.13 28.13 28.83<WOT timing at 4800rpm
29.88 49.92 43.95 35.16 31.99 29.88 28.13 28.13 28.13 28.13 28.13
29.88 49.92 43.95 35.16 31.99 29.88 28.13 28.13 28.13 28.13 27.07
29.88 49.92 43.95 35.16 31.99 29.88 28.13 28.13 28.13 28.13 26.02
29.88 54.14 48.16 36.91 31.99 29.88 28.13 28.13 28.13 28.13 24.96
29.88 56.95 45.00 36.91 34.10 33.05 30.94 28.83 28.13 26.02 23.91
29.88 54.84 41.84 36.91 33.05 28.83 28.83 27.07 26.02 22.85 21.09
29.88 48.87 43.95 35.16 31.99 28.83 27.07 26.02 24.96 21.09 18.98
20.04 48.16 45.00 35.16 30.94 28.13 24.96 22.85 21.09 16.17 13.01
20.04 48.16 42.89 30.94 27.07 24.96 22.15 17.93 14.06 9.84 8.09
20.04 40.08 37.97 30.94 27.07 22.85 20.04 16.17 11.95 7.03 4.92
20.04 20.04 20.04 20.04 20.04 15.12 9.84 9.84 5.98 4.92 4.92

VP "BAAM" Spark map

29.88 52.73 34.80 33.05 33.05 30.94 27.77 27.77 27.07 26.02 24.96<WOT timing at 4800rpm
29.88 43.95 31.99 31.99 31.99 29.88 27.77 26.02 26.02 23.91 23.91
29.88 45.00 34.80 31.99 31.99 30.94 28.83 27.07 27.07 26.02 24.96
29.88 40.78 34.80 33.05 33.75 27.07 28.12 23.91 22.15 22.15 22.15
29.88 40.78 34.80 33.75 31.99 26.02 27.07 23.91 22.15 22.15 22.15
29.88 43.95 34.80 31.99 30.94 28.83 27.07 23.91 22.15 22.15 20.04
29.88 45.70 33.75 31.99 29.88 28.83 26.02 22.85 21.09 20.04 18.98
29.88 45.70 34.80 31.99 29.88 26.02 24.96 22.85 20.04 16.87 15.82
20.04 46.76 35.86 30.94 27.07 24.96 22.15 18.98 15.12 14.06 10.90
20.04 34.80 33.05 29.88 26.02 22.85 15.82 13.01 8.79 7.03 4.92
20.04 26.02 34.80 30.94 22.85 21.80 15.12 13.01 9.84 4.92 2.81
20.04 20.04 20.04 20.04 20.04 15.12 9.84 9.84 5.98 4.92 4.92

You can bet that's worth 5 rwkw or so

Hmmm. Sounds good, but i put the memcal i got with the crow cam in. Would you know anything about them and if there are any real differences or should i just stick with the vn memcal?