Quickin

My 436 with:

Harrop butterfly intake
http://www.harrop.com.au/products/intake_systems.html

LS7 heads or ET Performance 265/41 heads (both are equal really, the 265's are a little better)

248/252 .610/.610 113 lsa (upgraded from my 242/242 .610/.610 114 lsa)

Its 480 RWHP 483 RWTQ now.

The reason I ask is because there's alot of talk that the 450 RWHP LS7 engine should make 600-650 RWHP with just a cam swap and an exhaust. Therefor, there is no reason my 436 wouldn't do the same or better.

vmax1500

Keep in mind that the 600-650RWHP is like you say... TALK Are you looking to pickup 170RWHP with a better set of heads, bigger cam and intake swap?

I noticed you have an A4... I don't think 650RWHP will be possible with an hydraulic cam and 436CI... if you could hit 600RWHP I think that would be major accomplishment!

When is the swap going to happen? I am very curious to hear the results...

Quickin

I've been talking with Harrop about this butterfly intake for the past 4 months. They have many daily drivers over there with over 600 RWHP with LS6 heads and intake, stock ported TB's and a smaller cam than I have right now. I was figuring with badass heads and a big *** cam I might be able to crack 600 RWHP and than some, even with my A4.

I'm unsure whether I want to go for all the N/A power possible (hydraulic cammed and pump gas) and than spray a 250 shot.

OR

Just get the Hi-Flo 76GTS single turbo kit and call it a done deal. This seem's like the better way to go for the power I'm wanting/needing. Plus I won't have to buy new heads and intake. It'll actually be cheaper than the N/A route. Either way the engine needs to be torn down.

But I do like the raw power of my N/A engine.

Still trying to make up my mind what to do, but one of these will begin sometime in January.

Q

vmax1500

I am in a simmilar boat to you... keep in mind that a turbo motor will destroy your A4... I think with 550RWHP is possible with an hydraulic cam pump gas big cube LS2... that's serious power... my car went 11.0's with a little 385CI LS1 that only made 430RWHP... with a 100HP shot it went 10.4's... 550RWHP is enough power to run 9's in a light well setup F-Body...

Quickin

I'm putting a 4L80E in when I do this. Its a badass tranny.

MountainMotor

iTrader: (2)

Yea, there's not much better than all N/A power. You could make some nice numbers with the turbo setup too. I guess it all comes down to what you want?

DONAIMIAN

iTrader: (18)

I dont see it being done without a solid roller.

Quickin

Is a solid roller that much of a pain in the *** for a daily driver?

And why does a solid roller make more power than a hyd?

BadBowtie03

iTrader: (1)

solid lifters are just more annoying... they are noisier and you have to check the lash every now and then to make sure everything is set right... The 489 in my sig is a solid lifter setup and its not that bad... I'm pretty sure they make more power cause they can essentially rev faster and higher.. there is no float or squishyness in the lifters from fluid loss...they dont have to pump up with oil...or worry about losing lift from oil loss... does that make sense??

magius231

iTrader: (8)

am I seeing it right that the butterfly intake is $5000? Forget that, I'd buy a turbo kit if thats what it takes...

Armageddon

iTrader: (41)

dang man... I could see money being better spent elsewhere. I seriously doubt you'd touch 650rwh without a solid roller setup.

DAPSUPRSLO

iTrader: (14)

I say go for it. If you don't make your goal swap in the solid cam, lifters, and big valve springs. I think alot of people are going to be pleasently suprised at the power these motors are going to be capable of with REAL intakes and the new head offerings out there now. I'd run a bigger hydraulic to get there, or atleast something with a good bit more overlap to do it and like I said if it doesn't work try to the solid. One thing you didn't mention was what kind of compression you are running or planning to run with the new heads, this will have an impact on your potential. Good luck!

P.S. Stay n/a, there are plenty of turbo cars running around, not many north of 600+rwhp n/a cars running around. Plus, you can always add that additoinal 150-200 shot down the road.

GuitsBoy

iTrader: (4)

Solid roller cams allow you to run much heavier springs without worrying about collapsing the lifters. The heavier springs then allow you to run much more agressive lobes that snap the valves open and closed quickly to get the most ammount of air to move through the engine.

gtovan

I think it is very possible and will attempt something similar next year w/ ETP 265 or wait for their splayed valve streetable heads and either a single plane or that Harrop. I made 535 rwhp w/ 843 Stage 3 heads and Fast 90/90. The better heads have to be worth at least 50 hp (320cfm vs. 380 or +400 w/ the splayed ) and the Harrop is suppose to be worth 75hp over a Fast set up, so I see 650 rwhp as doable.

Quickin

How about the Hogan intake, do you think it'll be better flowing than the Harrop? More power?

Which 265 head....40 or 41?

gtovan

Probably the 41's if I go that way, I've got to do more research on the intakes because I don't want to lose too much under the curve power for a bit more peak hp. The Harrop seems to be the best overall option to retain low & mid rpm power and peak, but I would like to find a more reasonably priced alternative that could do approximately the same job. My car is a daily driver so I don't want a track only setup.

Quickin

Yeah, me too. My car is ONLY a daily driven street car. Harrop told me they could plumb the intake for a direct port too, which seems to be the way to get me near the power I want. A single turbo kit is the other option.

V8er

iTrader: (2)

I am sure the Harrop is a great unit but your post is a little confusing. Are you sure these "600rwhp" cars have the Harrop with stock LS1 TBs

More info about these "600rwhp" cars would be appreciated!

NA$TY-TA

iTrader: (21)

FYI a 432ci motor is to much motor for a T76GTS.... you are going to be out of the turbo's efficiency way early... No reason to spent that much $$ if you are only wanting 650rwhp or are you wanting 650+250?? 900rwhp??
If so you are going to need a T-88 at least.... you will have to get the flow of that motor and match it to the compressor map of the turbo and see where u will be.
Plus new Pistons.... and a fuel system from hell to power it..... **** i have over $3000 in my fuel system. What do you have fuel system wise now??

Kyle

383ss

iTrader: (14)

I think you are dreaming if you think you'll gain 170rwhp with a head/intake swap.

I'll be doing a drag setup with some ET or DART heads and big cubes with an M6. I'm sure we'll see plenty of numbers this spring. my goal is to be done by March 11th.