Big Inch High HP Induction

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Jan 1, 2018 | 09:08 AM

#21

bjankuski

Safety Car

Joined: Sep 2001

Posts: 4,162

Likes: 555

From: Glenbeulah Wi

I am not sure if this qualifies as big HP but here is my 406 (making around 525-550 flywheel HP) intake set-up on my Firebird.

Modified HSR, this was on my corvette before I went with a LS7 in the vette.

Jan 1, 2018 | 12:03 PM

#22

C409

Thread Starter

Le Mans Master

Joined: Feb 2005

Posts: 6,486

Likes: 566

From: Clearwater Florida

..... Well that's an interesting upper air box ... not much stealth ram left there ! ... Nice ! .....

Jan 1, 2018 | 12:14 PM

#23

C409

Thread Starter

Le Mans Master

Joined: Feb 2005

Posts: 6,486

Likes: 566

From: Clearwater Florida

..... BTW ... anything over 400hp naturally aspirated is big enough to be proud of ! ... I'm just curious about what's providing the intake air to the engines of some of our C4's ... anything creative that displays some thinking outside the box qualifies ... that means no stock TPI intakes ... polishing or powder coating is not creative from an air flow standpoint .....

Last edited by C409; Jan 1, 2018 at 05:48 PM.

Jan 1, 2018 | 02:13 PM

#24

Jagdpanzer

Pro

Joined: Apr 2007

Posts: 567

Likes: 36

From: Fairfax VA

For us LT5 guys only alternative is to bore out the stock TB from 59mm to 63.35mm:

Jan 2, 2018 | 09:07 AM

#25

C409

Thread Starter

Le Mans Master

Joined: Feb 2005

Posts: 6,486

Likes: 566

From: Clearwater Florida

..... Nice ! ... I always liked the "sophisticated" look of the LT5 engine ..... How much air does a twin 2 1/2" throttle Body flow ? .....

Jan 2, 2018 | 01:39 PM

#26

DVNCI

Melting Slicks

Joined: Jun 1999

Posts: 2,949

Likes: 23

From: Bowling Green KY

Hogan on a 396 built by Jim B here on forum - haven't installed yet, hopefully soon!

Jan 2, 2018 | 01:52 PM

#27

bjankuski

Safety Car

Joined: Sep 2001

Posts: 4,162

Likes: 555

From: Glenbeulah Wi

That is nice! What kind of power are you hoping for?

Jan 2, 2018 | 02:16 PM

#28

Jagdpanzer

Pro

Joined: Apr 2007

Posts: 567

Likes: 36

From: Fairfax VA

Not aware if one has ever been flow tested.
However, I do know of several LT5s with increased displacement (415, 427, 441 CID) that are making North of 635 hp using the stock TB bored to 63.5mm. Cross section area of a twin 63.5mm TB is more or less equivalent to a single 90mm TB which flow around 1200-1250 CFM according to sources on the internet.

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Jan 2, 2018 | 02:42 PM

#29

DVNCI

Melting Slicks

Joined: Jun 1999

Posts: 2,949

Likes: 23

From: Bowling Green KY

Quote:

Originally Posted by bjankuski

That is nice! What kind of power are you hoping for?

Hoping for 800 or so with a Procharger F1A

Jan 2, 2018 | 05:08 PM

#30

C409

Thread Starter

Le Mans Master

Joined: Feb 2005

Posts: 6,486

Likes: 566

From: Clearwater Florida

Quote:

Originally Posted by DVNCI

Hoping for 800 or so with a Procharger F1A

..... Cool ! ... What is the runner length ? and who spec'ed it ? .....

Last edited by C409; Jan 2, 2018 at 05:09 PM.

Jan 2, 2018 | 06:24 PM

#31

DVNCI

Melting Slicks

Joined: Jun 1999

Posts: 2,949

Likes: 23

From: Bowling Green KY

Quote:

Originally Posted by C409

..... Cool ! ... What is the runner length ? and who spec'ed it ? .....

Not sure, I bought it used off a guy.

Definitely longer than stock though!

Jan 2, 2018 | 07:52 PM

#32

JoBy

Melting Slicks

Joined: Mar 2001

Posts: 2,151

Likes: 304

From: Timra, Sweden

Modified Holley Stealth Ram and a small Turbo. Everything clears the stock hood. 372 CUI ( 4.125 bore, 3.48 stroke )

600 whp with 6-7 psi boost. More with 20+ psi.

Jan 2, 2018 | 11:09 PM

#33

383tpimachine

Drifting

Joined: Feb 2008

Posts: 1,267

Likes: 27

From: Texas

I have a lil hogan on my 400. Speced by Hogan for 7500rpm spinning and bungs for a nitrous setup with burst panel

Jan 3, 2018 | 07:34 PM

#34

C409

Thread Starter

Le Mans Master

Joined: Feb 2005

Posts: 6,486

Likes: 566

From: Clearwater Florida

..... This is one of my attempts to get runner length under the C4 hood .....

Jan 3, 2018 | 08:04 PM

#35

dclafleur

Le Mans Master

Joined: Sep 2005

Posts: 6,551

Likes: 36

From: Jenks OK

is that built on an offenhauser dual ram?

Jan 3, 2018 | 09:56 PM

#36

C409

Thread Starter

Le Mans Master

Joined: Feb 2005

Posts: 6,486

Likes: 566

From: Clearwater Florida

Quote:

Originally Posted by dclafleur

is that built on an offenhauser dual ram?

.....Its an Offenhauser Cross Ram ... the top was available in a few different configurations ... single 4bbl , Tri-Power , and Dual Quad ... Edelbrock had a couple versions including the Smokey Ram ... and Chevrolet made one for the early Trans-Am racers ... THIS is the only Offy that I know of that is available in EFI ! ... I also had one of the Smokey Rams converted for EFI .....

Jan 4, 2018 | 10:04 AM

#37

dclafleur

Le Mans Master

Joined: Sep 2005

Posts: 6,551

Likes: 36

From: Jenks OK

That's awesome I've never seen one converted to EFI (Hell most of the time I see them in garages waiting on a build that'll never happen).

Jan 4, 2018 | 10:33 AM

#38

383vett

Race Director

Joined: Apr 2003

Posts: 17,700

Likes: 1,667

From: moraga ca

Quote:

Originally Posted by DVNCI

Hogan on a 396 built by Jim B here on forum - haven't installed yet, hopefully soon!

Looks great. Jim is building a motor for a friend of mine. Great work. Great guy!

Jan 4, 2018 | 10:37 AM

#39

Tom400CFI

Team Owner

Joined: Aug 2004

Posts: 21,543

Likes: 3,216

From: Park City Utah

Now THAT is AWESOME. I love it! A port EFI crossram. Nice work! What were the results?

Jan 4, 2018 | 02:36 PM

#40

DVNCI

Melting Slicks

Joined: Jun 1999

Posts: 2,949

Likes: 23

From: Bowling Green KY

Quote:

Originally Posted by 383vett

Looks great. Jim is building a motor for a friend of mine. Great work. Great guy!

Hey Willie!

Yeah I think I remember Jim telling me about that.

And yeah, Jim is great. Great communication, we spent a LOT of time just talking my motor through. He's definitely an asset to our community!

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