I,m upgrading my motor and I want to set up a total package that runs well together. I'm looking for 400 hp at the flywheel and it needs to be street smart. Anyone got a good combo of heads/cam/rockers/lifters/fuel injectors? Need to get a list going so I can go grocery shopping. There's snow on the ground and I'm getting bored.

This is what I have so far:

1995 Z28 (B4C actually), 350 LT1, funtional SLP ram air hood, SLP mid length headers, K&N air filter, 3" exhaust, high flow cat, SLP loudmouth silencer, 58mm TB, 3.73 rear, 4L60E.

Thanks!

 

That won't get you to 400 flywheel and the 58mm throttle body is a waste of money unless you are heads/cam. To get the numbers you want you are gonna have to do atleast a cam. All of those mods plus a hotcam would get you close and keep you nice and streetable. Alot of people knock the Hotcam but I am putting down almost 400 to the wheels with it.

 

Depends on what you want in the package... emissions? Lope?
LPE is never mentioned on this site for combinatios, but their 211/219 and ported heads/intake make for excellent driveablility.
While I had all emissions equip on the car with 1 5/8" shorties going into the stock dual cat y-pipe the car turned a best of 12.5 @ 110 at a 700ft ele. track in 70* weather. It was a consistent 12.6 @ 110. The times below are with LT's/ORY and on a 0' ele track in 40* weather. Car was a consistent 12.1 @ high 114's in average decent weather. All times are at the weight listed below.
The engine only had a slight lope and drove just like stock. Shift points were at 6100rpm.

What part of this:
Did you not understand?

 

That was very similar to my goal with a stock shortblock, so maybe a similar approach is right for you. I briefly considered and STS turbo, but decided to go all motor. Heads and cam are the foundation, and supporting parts will make or break the resulting performance. After LOTS of reading here, I picked the LE2 Head/cam package from Lloyd Elliot, mostly because Lloyd was very helpful on the phone. And, I have purchased all the supporting mods he recommended.

I started basically stock, so had to get LT's & Y, injectors, fuel pump, valvetrain and timing set, TB, etc. So far I've spent $2572 for heads and valvetrain, and $1871 on other supporting mods=$4443. Plus I'm replacing opti, WP, and clutch since pushing 90K miles. You can use a mail order tune to drive it initially , and then a dyno tune for optimizing it. I'ts as close to a 400HP package as I could find, although it's more of a 'formula for sucess' than a package. Just type LE2 into search and you will learn a lot. I'm sure somebody will chime in about Advanced Induction having similar heads and cams - that's another option with good results. The same supporting mods will be required to support that HP goal however your do it.

Note there is no garantee of 400HP. Providing the car is set up right, I think actually hitting the majic 400HP # with this package will depend on the dyno you go to as they can vary quite a bit. I'm leaning towards a Mustang dyno even though they seem to be lower than others, so I'm using the lower end of the 400-420HP range quoted for the LE2 setup. Frankly, I don't even know if that is corrected to SAE or not, but I would expect so.

Hope that helps get you started.

 

Whooops, I just noticed you said at the flywheel. The LE2 is 400+ at the wheels. That would be overkill. Do it anyway!

 

[QUOTE=SS RRR;4271189]Depends on what you want in the package... emissions? Lope?QUOTE]

Yes, it must meet emmisions. And also should idle smooth. In my opinion a good running engine should idle VERY smooth.

 

I thought that when he said "this is what I have so far" he was referring to his "shopping list", not his current mods already installed, easy killer

 

go with full bolt on's, a mild cam and ported stock heads or new heads. then if u ever want to go wild u can always throw a 100 or 150shot of nitrous in her!

 

There it is! I knew it was coming! This forum's solution to all horsepower problems.

Thanks for the reply but Please hold the Nitrous.

 

Youre going to need bolt-ons and a small cam to achieve 400hp at the crank. There are plenty out there that will idle smoothly, and get you the power numbers youre looking for. I'd say budget ~$2000 for everything assuming you do the install yourself.

An intake, set of headers and an exhaust system is probably going to run you around $1000 depending on how you do it. The cheapest route to go after that is the LT4 hotcam kit. Then add a tune and you should be really close to 400hp at the crank if not there. There's no need for a new transmission or the throttle body. A regular CAI will work as well, unless you just like the appearance of the SS intake system.

Any cam with 220-230* @ .050 of duration on both intake and exhaust will idle pretty smooth with good tuning and get you the power youre looking for. There are better cams out there than the LT4 Hotcam, just be prepared to pay a bit more for them and the supporting hardware.

edit - just reread and realized you already had the stuff mentioned in the first pagraph. Sorry! Anyways, go with a cam like i mentioned in the 220-230* duration. The cc503 (224/230) is as big as I would go. You can get away with smaller. As for supporting hardware, check this link:
http://www.compcams.com/technical/Ca...07/168-169.pdf

 

Just to clear this up for everyone. This is not what's on my shopping list - these are items already installed on my car. The SLP hood is the Ultra-Z hood. Don't nessassarily like the way it looks but it funtions very well. The 58mm TB I got for $100 so I figured I couldn't lose.

LPE has a great online store with lot's of info/packages. Thanks for that hint SS RRR.

Can someone explain what a LT4 hotcam is? Is it a GM part or aftermarket?

 

This is the hotcam kit:
http://www.sdpc2000.com/catalog/993/...mshaft-Kit.htm

Its a GM manufactured kit. It comes with a cam, valve springs, rocker arms and valve spring hardware.

 

Do the heads need machining for the LT4 hotcam, and what RPM's can be acheived?

 

the stock heads will work with the LT4 hotcam kit
i believe u can even some-what run the LT4 hotcam kit with the stock tune

you should go
ported intake (take advantage of that 58mm TB)
ported heads (try to contact eric bradby, he does great work)
LT4 hotcam kit
TB airfoil
you already have bolt ons, so now you have to get into the motor
you can even quite possibly achieve higher compression by switching to a thinner headgasket and getting a little HP that way.

 

Heads don't need machining and I shift at 6k. My power peaks around 6-6,100. Just curious, did you bore out the hole on your intake manifold to make it big enough for the 58mm throttle body?