The biggest place you would notice it is when coasting down, high vacum situation where the tires are driving the engine. Stepping on the clutch pedal changes the airflow requirements, pcm compensates. Base running airflow and throttle cracker can cover this.Originally Posted by EagleMark
Last edited by mecanicman; 12-06-2013 at 08:24 AM.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
For the needs of your particular build, I think the EFIConnection timing cover would be your best choice. You can use that cover with EFIConnections double row timing set that has the CMP reluctor built into it. This cover would give you what you are looking for----Double row chain, CKP sensor, CMP sensor and not affect your stock distributor.
Jeff
98 GMC RCSB, 5.0, 4L80e, Moser M60, 4.10 gear, Homemade twin turbo w/Junkyard T3 turbos, 24x CNP, 12200411 PCM.
Jeff,
Where can I see this cover/timing set?
EFIConnection's web-site leaves a bit to be desired. They seem to offer many products that aren't listed. A catalog would be ideal.
I've seen their modified Vortec cover that fits GEN I SBCs but it looks like it's simply the Vortec cover with a GEN I flange grafted on?
From my understanding, it still doesn't support a double row timing chain- If it does, they should list that detail on their web-site and they'd get a TON of sales!
I also don't see where where they offer a double row timing chain / reluctor combo?
I will be utilizing the 4x crank reluctor, which I don't think EFIConnection has re-tooled for GEN I / double timing chain applications.
Can you clarify?
Thanks!
Elm
Elm,
There will soon be a SBC / BBC distributor (small cap point style) that has both the '0411 4x crank sensor and the cam sensor. It will Not have provisions for the mechanical tachometer. The above mentioned distributor is patented! Pricing has not been determined. The first production run is scheduled in early 2014. Production runs are currently being quoted.
dave w
Dave,
Will this be a dual pickup distributor (4x and 1x sensors)? Will this be an EFIConnection item?
Sounds like a great idea but unless they sell the components individually, it still won't help with my specific application.
As stubborn as it sounds, I am not giving up my mechanical tach drive.
lol
The distributor I've mentioned Is Not a product to / from EFI Connections. The distributor is dual pickup, using two individual factory sensors. At this point in time, I can Not reveal who's distributor it is. Mechanical drive is PO$$IBLE, but your not going to like the price! At this point in time, I Can Not post screen shots of the CAD drawings.Dave,
Will this be a dual pickup distributor (4x and 1x sensors)? Will this be an EFIConnection item?
Sounds like a great idea but unless they sell the components individually, it still won't help with my specific application.
As stubborn as it sounds, I am not giving up my mechanical tach drive.
lol
dave w
The setup with the 1x cam signal on the front cover isn't available yet so not much detail. The picture does show double row timing gear sprockets.
You could use the LT1 kit for the double row timing chain. The water pump drive hole would have to be plugged.
Is there a link that shows what you speak of?
I don't need the 1x cam signal from the front cover, only the 4x crank signal.
I see nothing on EFIConnection's site that shows a Gen I front cover with provision for a double row timing set, reluctor and CKP.
The ONLY cover I've seen so far that accommodates all 3 items is the billet cover offered by TPiS for close to $300.
Please provide a link so I can see what you are suggesting.
Thanks!
Elm
Look at EFI Connections SBC page part way down.
http://www.eficonnection.com/temp/24x_coming_soon.png
EFI connection just sells 24X and 58X conversion stuff.
The 96-97 LT1 had a 4X wheel and cover on it. Not sure how well it clears a double row chain.
Why not just get a good single row chain?
Last edited by lionelhutz; 12-07-2013 at 05:04 AM.
This is a 24x reluctor I got from EFIConn. it was only $150 but is for single timing chain only. I run a hydraulic roller cam dont plan on revving over 7000rpm. GM didnt even run a double on the 1996 LT4 and it had the highest rev limit of any GEN 1/2 engine of 6412rpm. They did run roller rockers as the ball seat stamped rockers were galling above 6000rpm and GM designs for 200,000 mile durability nowdays. I wont pay $300 for a cover that you cant even see once installed, $20 plastic is good for me. Different strokes.
And here is the $25 distributer cover for Vortec V8 distributer use.
peace
Hog
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