Ram jet or ZZ4 - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SCOTI · 12-17-2002, 09:10 PM

PICKMUP . . . more info on that tank please. What pump are you using? What size fuel & return lines? Sending unit? How about a ballpark price range for members? I would just e-mail you but alot of times I post @ hm & then go to work or vice-versa, but @ both places I can just pull up the board. Thanks in advance, Scot.

jmil1974 · 12-18-2002, 11:22 AM

3/8 supply is typical, I believe. For EFI you need a return line AT LEAST as big as the supply, preferably a size bigger -- to prevent vapor lock and premature pump death.

Charlie Coleman · 12-18-2002, 01:26 PM

I have the Ramjet in my 68' and love it. It is a little cold blooded when first started but runs like a bat out of hell. Installation was easy. My two cents!

SCOTI · 12-18-2002, 04:07 PM

Can you elaborate on that cold start issue? I would think the 'puter would fully compensate idle quality/speed until the engine reaches normal operating temps just like late model vehicles. At least some of the press I've read on these 'factory fuel injected crate motors' is states easy cold starts & great throttle response.

Charlie Coleman · 12-18-2002, 04:19 PM

It starts fine, but if you try to put it in gear and go before it reaches operating temparture, it will stall. I usually give it a couple minutes, and she runs fine. Awesome motor though.

**1971Stepside** · 12-18-2002, 04:40 PM

GM even advertises it as being a great Cold Start engine....hmmm

SCOTI · 12-18-2002, 05:47 PM

That's really not a problem butttttt . . . I was really thinking it would be just like my GF's '02 T/A, just jump in- turn the key & off you go.

Charlie Coleman · 12-18-2002, 05:53 PM

Not mine, it's a little cold blooded.....het, maybe it's the lack of oxygen here in the mile high city!

SCOTI · 12-18-2002, 06:03 PM

@ least it starts right up, that counts for something in my book. Of course my million mile 6cyl will start the first try also . . . it won't stay running, but it will start. You know the drill, pump the pedal 4 times, turn the key, start, wait for it to die, re-peat. Usually will stay running the 2nd try as long as you idle it around 1500 or up . . . lol. Got any pics of that install?

12-17-2002, 09:10 PM	#26
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,098	PICKMUP . . . more info on that tank please. What pump are you using? What size fuel & return lines? Sending unit? How about a ballpark price range for members? I would just e-mail you but alot of times I post @ hm & then go to work or vice-versa, but @ both places I can just pull up the board. Thanks in advance, Scot. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.* Last edited by SCOTI; 12-17-2002 at 09:12 PM.

12-18-2002, 11:22 AM	#27
jmil1974 Ain't we cute? Join Date: May 2002 Location: Friendswood, TX Posts: 700	3/8 supply is typical, I believe. For EFI you need a return line AT LEAST as big as the supply, preferably a size bigger -- to prevent vapor lock and premature pump death. __________________ 69 C10 2WD LWB Fleet 350/350 power front disc conversion (6 lug disc kit from gmcpauls) and new engine, PS, A/C, fresh fluids, SHE DRIVES! FOR SALE $3900

12-18-2002, 04:07 PM	#29
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,098	Can you elaborate on that cold start issue? I would think the 'puter would fully compensate idle quality/speed until the engine reaches normal operating temps just like late model vehicles. At least some of the press I've read on these 'factory fuel injected crate motors' is states easy cold starts & great throttle response. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

12-18-2002, 04:40 PM	#31
1971Stepside Almost Satisfied Join Date: Mar 2002 Location: Springfield, MO Posts: 2,932	GM even advertises it as being a great Cold Start engine....hmmm __________________ 1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far."

12-18-2002, 05:47 PM	#32
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,098	That's really not a problem butttttt . . . I was really thinking it would be just like my GF's '02 T/A, just jump in- turn the key & off you go. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

12-18-2002, 01:26 PM	#28
Charlie Coleman Registered User Join Date: Jun 2000 Location: Franktown, CO. USA Posts: 533	I have the Ramjet in my 68' and love it. It is a little cold blooded when first started but runs like a bat out of hell. Installation was easy. My two cents!

12-18-2002, 04:19 PM	#30
Charlie Coleman Registered User Join Date: Jun 2000 Location: Franktown, CO. USA Posts: 533	It starts fine, but if you try to put it in gear and go before it reaches operating temparture, it will stall. I usually give it a couple minutes, and she runs fine. Awesome motor though.

12-18-2002, 05:53 PM	#33
Charlie Coleman Registered User Join Date: Jun 2000 Location: Franktown, CO. USA Posts: 533	Not mine, it's a little cold blooded.....het, maybe it's the lack of oxygen here in the mile high city!

12-18-2002, 06:03 PM	#34
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,098	@ least it starts right up, that counts for something in my book. Of course my million mile 6cyl will start the first try also . . . it won't stay running, but it will start. You know the drill, pump the pedal 4 times, turn the key, start, wait for it to die, re-peat. Usually will stay running the 2nd try as long as you idle it around 1500 or up . . . lol. Got any pics of that install? __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*



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