[Tigers] Tiger eplacement carb and alternator Questions

Gary garywinblad at comcast.net
Sat Jul 17 13:07:52 MDT 2021 

Hi Mayf,
  Lookup Speeduino.   Arduino Mega  can do it.
  I was working on that for a GM 2bbl TBI a few years ago.. and got 
distracted.
  I may be able to get re-invigorated if someone else is working on it...
Gary


On 7/17/2021 11:58 AM, Larry Mayfield via Tigers wrote:
>
> Theo, interesting points you make. And I have not heard  Megasquirt is 
> a long while! Why not consider a Raspberry Pi 3 B+ ? Certainly enough 
> brainpower. An arduino might  work also and it could handle it as 
> well. While I was thinking of a carb setup type of FI, a SEFI might be 
> just as good if implemented correctly. Or even a large throttle bore 
> with direct injection. Think I will look around and see if anyone has 
> made a DIY EFI system using any of this stuff.
>
> Thanks for reminding me…
>
> Mayf
>
> TWFS
>
> *From:* Theo Smit <tsmit at shaw.ca>
> *Sent:* Friday, July 16, 2021 7:28 PM
> *To:* Will Seay <Tigers at embarqmail.com>
> *Cc:* Larry Mayfield <drmayf at mayfco.com>; tigers <TIGERS at autox.team.net>
> *Subject:* Re: [Tigers] Tiger eplacement carb and alternator Questions
>
> Will and Mayf,
>
> I ran my Tiger with a BossEFI 4-barrel throttle body injection system 
> for about six or seven years. This is the system that got acquired (or 
> at least rebranded and marketed) by Professional Products.
>
> The version I had, still had the ECU separately mounted in the 
> passenger compartment; later versions had the electronics all 
> integrated in the throttle body assembly. This simplifies the wiring 
> but subjects the electronics to the under-hood heat, which is maybe 
> not a great idea.
>
> When I bought my crate motor, it came with a carb and so far I have 
> not put the BossEFI back on yet. The programming interface for the 
> BossEFI system was ... not great. It came with a number of pre-built 
> maps, but it was not easy to tweak in a logical way, and especially 
> its integration of air/fuel ratio feedback and timing control was just 
> weird. The car ran fine at WOT but the part throttle operation was not 
> easy to get right. This is partially because the Tiger will run all 
> day at really small throttle openings, and so you're always tuning 
> just a hair off the idle settings. I'm not sure if a throttle body 
> that had the injectors below the throttle plates would be better in 
> that regard.
>
> If / when I get time to go back to playing with that setup again, I 
> may look at using a third party EFI controller (such as Megasquirt, if 
> they are still making stuff that can be adapted to any generic 
> injector), rather than going back to 2003 era user interface and controls.
>
> To set the car up for the EFI system, I took many of the same steps 
> that Will did. I plumbed a 3/8 inch feed and return line from the back 
> of the car to the firewall and mounted a regulator on the firewall. I 
> initially used a high volume canister filter as a sort of surge can, 
> but currently I have the (stock) feed from the tank running about 12 
> inches forward, to a low pressure pre-filter. Then the return line is 
> teed in, and we go to the fuel pump and then the high-pressure post 
> filter. Those three pieces are all mounted under the trunk, behind the 
> Alpine spare tire well.
>
> I'm running a Denso 70 amp alternator that is small enough to tuck 
> ahead of the right cylinder head, still preserving the stock fan belt 
> line. I also have a Plex wideband O2 sensor mounted in the right 
> header collector.
>
> To convert back to the carburetor, I just swapped the 45 PSI regulator 
> out for one that would not flood the Holley carb's needle/seat. The 
> (high pressure) fuel pump just ends up circulating the fuel through 
> the return line, if there is any excess volume.
>
> Cheers,
>
> Theo
>
> ------------------------------------------------------------------------
>
> *From: *"tigers" <tigers at autox.team.net <mailto:tigers at autox.team.net>>
> *To: *"Larry Mayfield" <drmayf at mayfco.com <mailto:drmayf at mayfco.com>>
> *Cc: *"tigers" <TIGERS at autox.team.net <mailto:TIGERS at autox.team.net>>
> *Sent: *Friday, July 16, 2021 3:38:16 PM
> *Subject: *Re: [Tigers] Tiger eplacement carb and alternator Questions
>
> Mayf,
>
> I got the EFI bug some time ago when I saw a series of Hagerty 
> Youtube videos in which a Fairlane (5-bolt) 289 was rebuilt to a 289 
> HiPO-ish state and then put it in Brad Phillips Tiger.  The plan was 
> to do the engine swap and get the engine going with a Holley 4BBL 
> setup and then switch the 4BBL for a Holley Sniper EFI throttle-body 
> unit.  Brad got his Tiger going with the 4BBL setup but, to my 
> knowledge, never did the Sniper install.  Brad's engine swap was 
> recorded in a series of 12 Youtube videos.  Here are some links:
>
> Here's the first episode of Brad Phillips 289 engine swap: 
> https://www.youtube.com/watch?v=CzWYRPH24Bw&list=WL&index=2&t=26s 
> <https://www.youtube.com/watch?v=CzWYRPH24Bw&list=WL&index=2&t=26s>
>
> Here's the Hagerty time-lapse video of the engine rebuild: 
> https://www.youtube.com/watch?v=tVtrnxx3rTE&t=0s 
> <https://www.youtube.com/watch?v=tVtrnxx3rTE&t=0s>
>
> There is a Youtube video of a dyno test of the engine with and without 
> EFI.  So far I haven't found a link to it.
>
> I have been making plans to make my car "EFI-ready". That is, I want 
> to have a plan for each aspect of the conversion.  Current plan is to 
> replace the OEM fuel pump with the high pressure pump and to house 
> pump and pre and post filters in the same area as previously housed 
> the OEM pump.  I have made up a heat shield for the right-side muffler 
> to keep from roasting the pump.  Fuel return line will go into the top 
> of the right fuel tank.  I can provide pictures of the return line 
> fittings if you are interested.  I will be doing my own harness.  The 
> Holley harness is bass ackwards for a Tiger, assuming battery up 
> front.  Fuel relay and fuses for fuel pump and EFI will be 
> located with the pump. Anticipating that the fuel pump and injectors 
> will want to suck more current than the OEM generator can provide, I 
> have done an alternator conversion.  I already have a wide band O2 
> sensor installed for a PLX O2 readout so the O2 sensor is already 
> there. Control of distributor advance is optional with the Sniper so I 
> don't plan to do opt for that initially.  Someday I would like to add 
> it though. Should improve driveability and maybe performance.
>
> Like I said, I want to make the car "EFI-ready" .  Don't know if I 
> will actually do the conversion, but I want to at least have it 
> thought out so that I can get there from here if I decide to.
>
> Will - 382001570
> Tigers at embarqmail.com <mailto:Tigers at embarqmail.com>
>
> On Fri, Jul 16, 2021 at 9:46 AM Larry Mayfield via Tigers 
> <tigers at autox.team.net <mailto:tigers at autox.team.net>> wrote:
>
>     I have  owned my Tiger since Jan 1967, bought it used.  Has been
>     sitting quietly now for quite a number of years. And I want to
>     drive it a bit more now. But carbs are so old fashioned, lol. So,
>     seeking information from the groups experiences, those owners who
>     have replaced the carb with an electronic injected version: either
>     2 bbl or f bbl versions. If 2 bbl then I would just use the cast
>     iron intake manifold. If 4 bbl I need to know which is best for a
>     bone stock 260 cid which so far in my ownership  has never been
>     apart.  I tend to lean toward a 4 bbl version as I have a 5 bolt
>     289 with some performance capability and I would need to buy a
>     manifold for that.  I also have my 260 LSR motor which has the
>     full treatment and is a real race motor.   So, seeking real world
>     experience on what and which brands are most user friendly while
>     putting out power for driving around, having some fun (again).
>
>     Larry, mayf, drmayf etc
>
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