TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

HSR on swirl port heads

Thread Tools
 
Search this Thread
 
Old 11-23-2010, 03:49 PM
  #1  
TGO Supporter

Thread Starter
 
Keith5's Avatar
 
Join Date: Oct 2000
Location: Wilmington NC
Posts: 1,231
Likes: 0
Received 0 Likes on 0 Posts
Car: C1500
Engine: 350
Transmission: 700r4
Axle/Gears: 2.73
HSR on swirl port heads

I have an L05 truck. Has anybody ever put a Holley Stealth Ram on an L05? I plan to put an LT1 cam in also, and do some mild porting on the heads.

Later on there may be a head swap in the works, but If I could get some gas mileage increase and somewhere north of 250hp and 330ft-lbs, with the looks of the stealth ram I'd be happy.

So would it be a total dog? Or decent?
Old 11-23-2010, 06:07 PM
  #2  
Member
 
DSGx's Avatar
 
Join Date: Mar 2010
Posts: 144
Likes: 0
Received 0 Likes on 0 Posts
Car: 92 Pontiac Firebird
Engine: 305 TBI L03
Transmission: 700r4
Axle/Gears: 2.73 one wheel drive
Re: HSR on swirl port heads

Originally Posted by Keith5
I have an L05 truck. Has anybody ever put a Holley Stealth Ram on an L05? I plan to put an LT1 cam in also, and do some mild porting on the heads.

Later on there may be a head swap in the works, but If I could get some gas mileage increase and somewhere north of 250hp and 330ft-lbs, with the looks of the stealth ram I'd be happy.

So would it be a total dog? Or decent?
What u wanna do is switch to TPI ? yeah u can use that intake with the l05 heads, with an lt1 cam i think that should put u right were you want to be in HP and torque, u should port and polish the stockers someone here got nice results from it with those heads and they are good for trucks cuz the swirl ramp generates nice low end torque wich is always cool on a street truck engine.
Old 11-23-2010, 06:22 PM
  #3  
Senior Member
 
xch3no2's Avatar
 
Join Date: Oct 2009
Location: Pacific NW
Posts: 676
Likes: 0
Received 1 Like on 1 Post
Car: 89 K3500 Fleetside
Engine: RAT *tbi* EBL
Transmission: TH400
Axle/Gears: 3.73-Dana 60
Re: HSR on swirl port heads

I feel sorry for your engine...you want to install an HSR for WHAT,..looks??

I'm simply speechless...

Well maybe except for the fact that you are MILES from maximizing the use of your TBI...

Last edited by xch3no2; 11-23-2010 at 06:27 PM.
Old 11-23-2010, 06:29 PM
  #4  
Junior Member

iTrader: (3)
 
LB87FORMULA's Avatar
 
Join Date: Aug 2001
Location: Sagamore Hills, Ohio, USA
Posts: 98
Likes: 0
Received 0 Likes on 0 Posts
Car: 87 Pontiac Formula
Engine: 5.7L Crate Engine
Transmission: 5spd NWC
Re: HSR on swirl port heads

My last setup was a 87 TPI was LO5 crate engine, swirl port heads and LT1 cam. It ran great with tons of torque. I did some tuning but never really optimized the setup. I just switched to vortec heads, zz4 cam and ramjet intake. I plan to use the EBL to tune. This has yet to run.
I agree with DSGx that a TPI would be a better fit. I have some datalogs if you are interested.
Old 11-24-2010, 08:10 AM
  #5  
TGO Supporter

Thread Starter
 
Keith5's Avatar
 
Join Date: Oct 2000
Location: Wilmington NC
Posts: 1,231
Likes: 0
Received 0 Likes on 0 Posts
Car: C1500
Engine: 350
Transmission: 700r4
Axle/Gears: 2.73
Re: HSR on swirl port heads

Originally Posted by xch3no2
I feel sorry for your engine...you want to install an HSR for WHAT,..looks??

I'm simply speechless...

Well maybe except for the fact that you are MILES from maximizing the use of your TBI...
Oh don't be so serious, it's an engine, I'm only doing anything to it at all for fun anyway. I've done the TBI thing years ago, I'm ready to move on with this project. Although in the end I might stay TBI if money demands it.

I just wanted to know if the mismatch would pose too much of a problem for it to effiicient. I plan on going with the EBL as well. Would I lose potential gas mileage with the L05 and stealth ram compared to a TPI intake?
Old 11-24-2010, 10:27 AM
  #6  
Senior Member
 
Doom86's Avatar
 
Join Date: Oct 2004
Location: SE, Ohio
Posts: 965
Likes: 0
Received 2 Likes on 2 Posts
Car: '86 Z28, '91 RS
Engine: 305ci, 305ci
Transmission: TH200c (no kidding), TH700r4
Axle/Gears: 2.73, 2.73
Re: HSR on swirl port heads

Originally Posted by xch3no2
I feel sorry for your engine...you want to install an HSR for WHAT,..looks??

I'm simply speechless...

Well maybe except for the fact that you are MILES from maximizing the use of your TBI...



It would be one mixed up turd is all I can think.

If you are doing it for fun have at it, though it doesn't smell right to me. Just make fun your only goal and you'll be successful.
Old 11-24-2010, 02:35 PM
  #7  
TGO Supporter

Thread Starter
 
Keith5's Avatar
 
Join Date: Oct 2000
Location: Wilmington NC
Posts: 1,231
Likes: 0
Received 0 Likes on 0 Posts
Car: C1500
Engine: 350
Transmission: 700r4
Axle/Gears: 2.73
Re: HSR on swirl port heads

My friend put the stealth ram on his stock L98 IROC along with headers. He saw some very good results from that. I have read that L05 heads ported are close to the flow of an L98 head so would it really be that bad?
Old 11-26-2010, 01:17 PM
  #8  
TGO Supporter

Thread Starter
 
Keith5's Avatar
 
Join Date: Oct 2000
Location: Wilmington NC
Posts: 1,231
Likes: 0
Received 0 Likes on 0 Posts
Car: C1500
Engine: 350
Transmission: 700r4
Axle/Gears: 2.73
Re: HSR on swirl port heads

Ok, lets say I clean up the L05 heads, get an edelbrock TBI intake, put in the Lt1 cam, and get an EBL. This would end up being cheaper than going MPFI even with good used parts.

Would TPI or the HSR benefit me more in this instance, than staying TBI, where torque, power, and gas mileage are concerned?
Old 11-26-2010, 01:34 PM
  #9  
Senior Member
 
xch3no2's Avatar
 
Join Date: Oct 2009
Location: Pacific NW
Posts: 676
Likes: 0
Received 1 Like on 1 Post
Car: 89 K3500 Fleetside
Engine: RAT *tbi* EBL
Transmission: TH400
Axle/Gears: 3.73-Dana 60
Re: HSR on swirl port heads

Addressing the cam & heads will gain you the most.
TBI mods & intake will support those gains.

The EBL is your best bet for tuning as you can have one tune for max performance & another for max economy, switching back & forth can be done on the fly.

Last edited by xch3no2; 11-26-2010 at 01:38 PM.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
MoJoe
Engine/Drivetrain/Suspension Parts for Sale
11
09-24-2015 09:12 PM
Brendankup
TPI
2
08-30-2015 01:46 PM
355tpipickup
Alternative Port EFI Intakes
3
08-29-2015 10:47 PM
ASE doc
Alternative Port EFI Intakes
5
08-25-2015 09:14 AM
355tpipickup
Tech / General Engine
3
08-13-2015 07:35 AM



Quick Reply: HSR on swirl port heads



All times are GMT -5. The time now is 12:01 PM.