I Want To Build My 2v! Help!

8.5:1 = NO! Also, if you are building a motor, you might want to look at more than the M112. See the other thread. If you dont want a lot of hp.....just 500 or so, sure the M112 will be fine, but if you want anything more than that, go with something else....Whipple, KB, TVS.....

I have a 9.1:1 motor, Stage 3 heads, Stage 3 cams, and a 2.9L Whipple.....and it SUCKS driving around town at 30 mph. If it is 40, I'm fine, but below 2000 rpms, it is horrible. I wish I would have done a 10:1 CR and 14-15 psi and still been at the same level I am now.

On what you need to build the engine, I kind of like MODMAX for rotating assemblies. I have an MMR engine, and while some people say bad things, I haven't had any problems.....but then again, my builder went over it with a fine tooth comb.

Im selling the setup off my 2v That will give u exactly what u want. I've got it posted in the classifieds under power adder. All parts only have 2000miles on them. I put down just under 550@ the tires.http://www.stangnet.com/mustang-for...tor-efi-6061-bgg-8-rib-2kmiles-on-all.860668/

vertigasen said:

8.5:1 = NO! I have a 9.1:1 motor, Stage 3 heads, Stage 3 cams, and a 2.9L Whipple.....and it SUCKS driving around town at 30 mph. If it is 40, I'm fine, but below 2000 rpms, it is horrible. I wish I would have done a 10:1 CR and 14-15 psi and still been at the same level I am now

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Sorry bro but I have to disagree with you on this one. I don't think your compression ratio has anything to do with your car being a slug in lower RPM's. Last I checked the compresson ratio on an 03 cobra was only 8.5. I think your problem is your stage 3 cams. They are costing you some serious low end tq. That massive blower isn't helping either because of the ammount of power required to turn those big heavy rotors. Honeslty even with that bad ass blower I would have not gone beyond a stage 2 cam. I say this because once you step into aftermarket cams the different stages dont really add much power they simply steal it from the lower end and add it to the top. There was a GT500 cam swap done by VMP in MM&FF that demonstrated this. They didnt actually say it but if you looked at the dyno graph it was plain as day.

darkside03gt said:

Sorry bro but I have to disagree with you on this one. I don't think your compression ratio has anything to do with your car being a slug in lower RPM's. Last I checked the compresson ratio on an 03 cobra was only 8.5. I think your problem is your stage 3 cams. They are costing you some serious low end tq. That massive blower isn't helping either because of the ammount of power required to turn those big heavy rotors. Honeslty even with that bad ass blower I would have not gone beyond a stage 2 cam. I say this because once you step into aftermarket cams the different stages dont really add much power they simply steal it from the lower end and add it to the top. There was a GT500 cam swap done by VMP in MM&FF that demonstrated this. They didnt actually say it but if you looked at the dyno graph it was plain as day.

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Hang on.....I only said the compression ratio was part of the problem. Please notice that I listed 4 items that have contributed to the problem. If I was a point to a point and a half higher on the CR, I dont think I would have the problem. Power is not an issue. I have over 350 rwtq from the start of the dyno graph ~2300 rpms and over 200 rwhp. Yep, the cams might have something to do with that, but I said that they do contribute to it. The old way of thinking was low compression, high boost........now it is higher compression and moderate boost. Ford must agree with that to some end because they upped the CR for the 2013 GT500 from 8.4:1 to 9.0:1 and the same is true for the v6 ecoboost. It is a 10.0:1 CR and something like 12 psi.

My whole point is that building an 8.5:1 CR on an M112...you arent going to make crap for power. About 14 psi is all that you are going to get out of it before the heat kills anything that it might have made for power. I would guess not much more than 500 (or less). Cobra Eaton cars @ 14 psi are not putting down crazy numbers.....thats why they swap blowers. They might get 550 or so, but thats it. 2v's dont breath as well.

If you are going to drop 5k or so on an engine, I think it would be best to get something that will do what you want. He said he wants 500 - 600....he wont get that with 8.5:1 and 12-14 psi.

vertigasen said:

The old way of thinking was low compression, high boost........now it is higher compression and moderate boost. Ford must agree with that to some end because they upped the CR for the 2013 GT500 from 8.4:1 to 9.0:1 and the same is true for the v6 ecoboost. It is a 10.0:1 CR and something like 12 psi.

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The best is high compression and high boost (look at a diesel engine and its thermal efficiency) but practical, real world problems such as detonation have, until recently, prevented that combo. What makes it possible on the Ecoboost is the use of direct injection which has a more effective charge cooling effect as the fuel atomizes in the cylinder rather than in the intake port behind the valve.

If and when Ford gets around to direct-injecting the GT500 mill watch its compression ratio go up at the same time.

Just curious if you're planning on swapping out to a t56 because t45 or 3650 aren't rated for those kind of numbers....just something to think about....better add another $3000+ to ur build cost if you're currently running stock trans. I stayed at the 400-425 level for that reason. Food for thought

I figured it would cost another $10k easy to move over the 500hp mark and do it right...not worth it to me on top of the $4500 I just put into the tork tech swap

this is my setup
1997 mustang GT with an 02 engine 2valve.
-the bottom end is builded for for racing with low compression pistons and rods
-CP piston 8.9.1---17cc
-Vortech Supercharger V2 boosting 12 psi,
-I will boost more when i get an intercooler and aftermarket intake
-long tube headers
K-member kits
I will make another video with more time....

im running 10.3:1 and 13lbs of boost, on E85 tho...