[Gmecm] TPI vs TBI & others

[Åke Georgsson]

Beau Blankenship wrote:

>Some folks here may remember, I just made that switch from TBI on a
>Performer intake to basically stock TPI with LT1 injectors. The TBI was the
>Pro-Jection TB (2" bores) run by a GM '7747.  I can honestly say that the
>TBI had noticeably more power in the higher RPMs. Highway driving was really
>fun at times. BUT, it was kind of sluggish around town and had a hell of a
>time holding its speed on the highway with the boat hooked up (unless, of
>course, the speed was 90mph). Then came a motor swap. Basically the same
>350, bored, flat-top pistons, small-runner small-valve heads, etc. The cams
>were a little different (TBI motor had a large 218/226 cam and the TPI got a
>206/214). The TPI motor has plenty of low-end torque to pull the boat at any
>highway speed in OD. But those long steep hills on the way to the Brady
>Mountain Marina require a very generous right foot in 2nd gear. I would
>never trade the TPI for another TBI in my daily driver. If I were building a
>racecar, I would probably not use the TPI due to its lack of high-rpm power.
>But for my Blazer, I have to agree with William. The TPI has plenty of low
>RPM torque and only falls short of the TBI over 4000-4500 RPM "in my
>experience." I tend to not trust manufacturer's dyno tests and claims,
>because their engine is not what is in my truck. Both types of GM EFI have
>their benefits, but I would NOT say that the TPI has any problem with low
>RPM torque.
>
>Beau Blankenship
>
>-----Original Message-----
>From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf
>Of Chris Reynolds
>Sent: Wednesday, August 30, 2006 8:53 PM
>To: gmecm at diy-efi.org
>Subject: Re: [Gmecm] TPI vs TBI & others
>
>Dyno test on 7 different swaps.  Dual plane manifolds give more torque down
>between idle-2,200 rpm than the TPI setup, then out pull it again over
>4,500.   
>
>William Lucke <william.lucke at highspeedlink.net> wrote:  My experience with
>TPI is that it has tremendous low RPM torque. I'm 
>wondering evidence people who claim otherwise are basing their claims on...
>
>Also, someone asked how TPI compared to a couple of other manifolds. Due 
>to a bug in my email program (Thunderbird), I can't reply to that 
>message. From what I've heard, the Holley Stealth Ram (HSR) is currently 
>the hot setup for replacing a TPI with something more high RPM oriented, 
>but not as much so as a Mini-Ram.
>
>yiihaaa  il think il has thrown cas on an burning fire .. lot?s of comments and it splits the community in 2 
>
   well  has any one been using  the   Accel DFI Pro-Ram Fuel Injection 
Systems for Small Block Chevy 
<http://store.summitracing.com/egnsearch.asp?N=400020+310653+115&autoview=sku>    
http://store.summitracing.com/partdetail.asp?autofilter=1&part=ACC%2D77142&N=700+400020+4294925239+4294853151+115&autoview=sku
its got lots of bennefits on the calibrateoption comperd to using a 
stock ecm 8 if u havent got any material to remapp it )

>_______________________________________________
>Gmecm mailing list
>Gmecm at diy-efi.org
>Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm
>Main WWW page: http://www.diy-efi.org/gmecm
>
>
> 		
>---------------------------------
> All-new Yahoo! Mail - Fire up a more powerful email and get things done
>faster.
>_______________________________________________
>Gmecm mailing list
>Gmecm at diy-efi.org
>Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm
>Main WWW page: http://www.diy-efi.org/gmecm
>
>_______________________________________________
>Gmecm mailing list
>Gmecm at diy-efi.org
>Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm
>Main WWW page: http://www.diy-efi.org/gmecm
>
>
>  
>