vette heads pocket ported, with three angle valve job.

ported accel or edelbrock base or siamese stock ported base

ported ltr's

everything port matched

also will need reprograming

this is on a speed density

P.S. I know other heads will flow better, but i'm using the aluminum L98's

 

You can slap in the cam and it will work now. Do you mean will you see big power gains now or later?

 

well I was going to install everything at once, but your saying it would work good now? what do you think the difference would be between now, and then after the intake mods? I guess I'm asking how would it run with the mods in my sig? and then how much better with the future mods listed above?

 

It needs a little more breath than the stock TPI will give it, and IMO it wouldn't be worth the extra work. Do it all at once, tune and drive

Get an aftermarket base for sure - they have lots of meat for enlarging the ports, where as if you siamesed a stock base you run the risk of cylinder starvation from uneven air travel.

 

Okay, according to my best guess your current engine on DD2000 is making 290HP and 360 TQ at the flywheel. The porting work will give you about 10 HP. The intake, runners and plenum will give you 35 hp and 40 tq as you take advantage of the other mods and this lets the engine breathe. This is still with the stock cam.

Just swapping in the cam would only give you 10 HP and 40 TQ.

All the changes at one time gives you 330 HP and 430 TQ. The heads are the limiting factor.

A set of Trick flow heads ups it to 355 HP and 440 TQ.

A set of Ported Vortecs like mine gives you 370 HP and 450 TQ.

This doesn't include any changes due to compression ratio changes.

 

two things
1 is , that is the best reply that i've had yet, thank you for all the work:yourock:
2 is, don't you need the scoggin dickey setup for the vortech heads? I mean the vortech base and all that?
darn, my 97 siera truck has a 350 vortech. hmmmmmm!!!! Oh one other thing though, you said about 290 hp stock, with intake mods and ported heads about 45 more, then when you add the cam about 330 total hp. thats 5 less hp than with just the intake mods??

 

I had to do some guessing on some of this since I don't have all the numbers for you combination. And I got in a hurry, the numbers with just the intake mods and no cam or head mods are 310 HP and 390 TQ.

All at once you get 330 HP and 430 TQ.

This is still best guess but it should be close. Also this is assuming an aftermarket base. A ported stock base won't get you quite this far.

Yes, you would need a different base for Vortec heads.

A set of Dart Iron Eagle heads gets you almost the same as the Vortecs.

After looking this over it still doesn't look right. I looked closer at the stock cam specs I was given by someone else and I think they are wrong. I know the numbers with the new cam are right but the stock cam numbers are too high. I will have to try and find the stock cam specs to verify them.

 

Okay, I got the right cam data. RIght now you have about 245 HP and 390 TQ.

Just putting the new cam in with no other changes gets you.

300 HP and 400 TQ.

All at once or all the changes nets you 330 HP and 430 TQ. HP could be up to 345 depending on how your intake parts work together.

 

I would like to see that result in reality from just a cam. No offense, but I think DD2000 is a little liberal.

 

The cam is a BIG improvement over the stock one. So it will give a big boost. Since he already has the exhaust set up it takes advantage of that. So it' not really just the cam, it's that it will now take advantage of the other mods already made. Is it 100% accurate, no, but it has been proved many times, it's close.

 

how do you know how to set the ivo, evo, on the desk top dyno?

 

If you put in the cam specs and lobe separation then it goes off that. Getting the exact specs off the cam card or off my CamDisk is the most accurate way to do it.