budget build questions for the advanced tuners 6825 ecm $0d bin

**dave w** · 03-16-2017

The 8625 PCM requires using a 4K resistance Knock Sensor. I agree with 1project2many, a knock sensor with a near identical bore, as long as the knock sensor measures 4K +/- a very small %.

dave w

**jim_in_dorris** · 03-16-2017

Thanks guys, that's the response I was hoping for. The block has been bored 30 over so the bore is 3.9, half way between the 3.8 and 5.7 bores.
I think the $0D mask uses injector sizing. I know the fuel will be way off, and I am fairly certain the timing will also need work, but that is okay, it isn't my daily driver.

**jim_in_dorris** · 03-18-2017

Any thoughts on using a comp cams 12-230-2 cam. 250/260 adv. duration. 110 lsa. 432/444 lift with 1.5s, 461/474 in 1.6s. Will it be able to run at all on a stock $0D bin?

**1project2many** · 03-19-2017

Comp's online cam selector doesn't show this cam for an EFI application but I think you'll be ok. It looks fairly mild. It's got less lift and duration than the Speed Pro cam in my '57 although the lobes are a little tighter. 35 deg overlap vs 64 on the Speed Pro.

Is this something you have already, or is one for sale at a good price?

Edit: I just started looking at cams for SBC and nearly fell off my chair! $250 for flat tappet cams??? Ouch!!

**jim_in_dorris** · 03-20-2017

It's not an efi application cam, that is why I asked. It is fairly mild, with the 1.6 rockers I am at the limits of lift for the heads. I really can't afford to do to much work at the machine shop, so I limited myself to that cam. I found it at AutoZone for a really good price, but I am waiting until the first of the month to buy it. I have run a bunch of cams through Desktop dyno, and this cam seems like it produces the best numbers for the money I can afford. I am willing to look at other cams, but none of them seem to be very effective with this small a displacement and the 193 heads. I also try to get my torque in as early as possible, so a bigger overlap and looser lobs doesn't seem to work as well for a pickup.

**1project2many** · 03-20-2017

I have a 350 hp 327 copy cam in my truck and that's definitely not an EFI cam. It wasn't as easy to use with the original 1983 Camaro ecm but the 7427 was easy to tune. I wonder if the EFI friendly qualities that were developed in the '80s when no one had access to tuning are still being applied to some of the cams.

Crane makes a couple of low rpm peak cams as well. 114102 is 500 to 4000 rpm while 113971 is 800 - 4600 rpm. I've used the 114102 with excellent results under a carb in a 350 with swirl port heads. The truck had 2.73 axles and a manual trans. The combination was very strong on the highway.
http://www.cranecams.com/uploads/cat...%20Catalog.pdf

**Fast355** · 03-21-2017

Originally Posted by 1project2many

I have a 350 hp 327 copy cam in my truck and that's definitely not an EFI cam. It wasn't as easy to use with the original 1983 Camaro ecm but the 7427 was easy to tune. I wonder if the EFI friendly qualities that were developed in the '80s when no one had access to tuning are still being applied to some of the cams.

Crane makes a couple of low rpm peak cams as well. 114102 is 500 to 4000 rpm while 113971 is 800 - 4600 rpm. I've used the 114102 with excellent results under a carb in a 350 with swirl port heads. The truck had 2.73 axles and a manual trans. The combination was very strong on the highway.
http://www.cranecams.com/uploads/cat...%20Catalog.pdf

I have run the Stock 305 HO grind in several TBI and TPI setups. Has a smooth idle with plenty of vacuum and makes good mid-top range TQ and HP.

Its like 202/207@ .050, .415/.430" lift cut on a 114° LSA and 114° ICL.

I have also used several of the 204/214 @ .050 grinds in them. With .423/.446" lift it would be a stretch to run a 1.6:1 rocker with stock TBI springs. Woth its 112° LSA and 4° built-in advamce it builds more low RPM torque but falls off on the top end more quickly.