Tim M - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Low68 · 04-03-2003, 10:43 PM

Hey, you said you have a ramjet. I bought one recently and put it in my truck. I noticed a hissing sound sometimes when accelerating, and asked someone about it and they said that it was the throttle body. It seemed logical because it sounds like it is coming from the front of the engine, but I was curious to see if anyone one else with one of these engines has this sound. Anyways, to my question. Do you have this sound when accelerating? If not, have you done anything different to the engine? What type of air filter do you have on your truck. I will include a picture with the air filter that I have. Thanks.

Stroker · 04-03-2003, 11:22 PM

Sorry I can't help with your problem, but how do you like the RamJet other than the hissing. BTW it sure looks good...Stroker

Hooter · 04-03-2003, 11:26 PM

is the hissing the sound of the air entering the throtle body perhaps?

Low68 · 04-04-2003, 02:16 AM

Hooter, That is what I was told. The guy said it was because the venturi is small in comparison to the amount of air that is entering.

I like the motor a lot. It is nice to not have to deal with the carb. It is not fast enough for me though. It ran a 15.5 in the quarter mile, but I want it to go faster. I have some aluminum heads that I can put on and I was going to buy a camshaft. Then have someone reprogram it. That would be sweet. Anyways, yeah I like it. It starts fairly easily. It doesn't start up as good as a new car where it only turns over 1 time and starts, but it is definately better than the carb.
Low68

Low68 · 04-04-2003, 01:49 PM

ttt

cochino12 · 04-04-2003, 02:28 PM

Don't know anything about the motor but it looks pretty sweet in there!!

MandarinSixSeven · 04-04-2003, 03:56 PM

Not really the same thing, but I know a guy who got a T.B. spacer put in his F.I. truck and it produces a really noticable hissing.whistle type sounds upon acceleration. Apparently its normal with the aftermarket spacers...maybe yours has something like that, I dont know im just guessing, as I know nothing about fuel injection

PloreOSU · 04-04-2003, 04:02 PM

Check for leaks around the air intake and throttle body. My Dad's Tahoe had a bad hissing sound when he installed a new airbox on it. It turned out that the seal from the airbox to the throttle body was leaking.

Low68 · 04-04-2003, 04:46 PM

Thanks for the tips guys.
low68

tim m · 04-04-2003, 11:01 PM

Low 68
I don't have a Ramjet in mine, I have a ZZ4. I wish I did, mine is a real cold start. I have to warm it up for about 5 minutes before it runs right.

low 84 · 04-04-2003, 11:12 PM

i'm betting it just the air sucking into the throttle body too. i got a couple buds who have open element k&n's on there new vortec trucks and they make a very loud hiss when acclerating.

Low68 · 04-05-2003, 04:28 AM

ok, thanks for all the replies. Sorry Tim, I must have misread a post or something.
Low68

04-03-2003, 10:43 PM	#1
Low68 Registered User Join Date: May 2001 Location: Arizona Posts: 758	Tim M Hey, you said you have a ramjet. I bought one recently and put it in my truck. I noticed a hissing sound sometimes when accelerating, and asked someone about it and they said that it was the throttle body. It seemed logical because it sounds like it is coming from the front of the engine, but I was curious to see if anyone one else with one of these engines has this sound. Anyways, to my question. Do you have this sound when accelerating? If not, have you done anything different to the engine? What type of air filter do you have on your truck. I will include a picture with the air filter that I have. Thanks. Attached Images __________________ Build Thread

04-03-2003, 11:22 PM	#2
Stroker Registered User Join Date: Mar 2001 Location: Moore, Ok Posts: 1,149	Sorry I can't help with your problem, but how do you like the RamJet other than the hissing. BTW it sure looks good...Stroker __________________ 72 SWB parts and pieces Oklahoma

04-03-2003, 11:26 PM	#3
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	is the hissing the sound of the air entering the throtle body perhaps? __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life

04-04-2003, 02:16 AM	#4
Low68 Registered User Join Date: May 2001 Location: Arizona Posts: 758	Hooter, That is what I was told. The guy said it was because the venturi is small in comparison to the amount of air that is entering. I like the motor a lot. It is nice to not have to deal with the carb. It is not fast enough for me though. It ran a 15.5 in the quarter mile, but I want it to go faster. I have some aluminum heads that I can put on and I was going to buy a camshaft. Then have someone reprogram it. That would be sweet. Anyways, yeah I like it. It starts fairly easily. It doesn't start up as good as a new car where it only turns over 1 time and starts, but it is definately better than the carb. Low68 __________________ Build Thread

04-04-2003, 01:49 PM	#5
Low68 Registered User Join Date: May 2001 Location: Arizona Posts: 758	ttt __________________ Build Thread

04-04-2003, 02:28 PM	#6
cochino12 It followed me home? Join Date: Mar 2003 Location: Yup Posts: 5,751	Don't know anything about the motor but it looks pretty sweet in there!!

04-04-2003, 03:56 PM	#7
MandarinSixSeven Seasonal Poster Join Date: Apr 2002 Location: Kelowna BC Canada Posts: 896	Not really the same thing, but I know a guy who got a T.B. spacer put in his F.I. truck and it produces a really noticable hissing.whistle type sounds upon acceleration. Apparently its normal with the aftermarket spacers...maybe yours has something like that, I dont know im just guessing, as I know nothing about fuel injection __________________ 67 GMC Short Step 350/4-Speed/3.08 Posi Front/Rear Sway Bars Kelowna BC, Canada Member of DTPW

04-04-2003, 04:02 PM	#8
PloreOSU Registered User Join Date: Jan 2003 Location: Portland, OR Posts: 42	Check for leaks around the air intake and throttle body. My Dad's Tahoe had a bad hissing sound when he installed a new airbox on it. It turned out that the seal from the airbox to the throttle body was leaking.

04-04-2003, 04:46 PM	#9
Low68 Registered User Join Date: May 2001 Location: Arizona Posts: 758	Thanks for the tips guys. low68 __________________ Build Thread

04-04-2003, 11:01 PM	#10
tim m Registered User Join Date: Mar 2001 Location: Gilbert Az Posts: 286	Low 68 I don't have a Ramjet in mine, I have a ZZ4. I wish I did, mine is a real cold start. I have to warm it up for about 5 minutes before it runs right. __________________ 1970 k10 1971 C10 Gilbert Az

04-04-2003, 11:12 PM	#11
low 84 Registered User Join Date: Jan 2002 Location: Houston, TX Posts: 2,144	i'm betting it just the air sucking into the throttle body too. i got a couple buds who have open element k&n's on there new vortec trucks and they make a very loud hiss when acclerating. __________________ '51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works '05 1500 Crew Cab RIP '84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker '80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's

04-05-2003, 04:28 AM	#12
Low68 Registered User Join Date: May 2001 Location: Arizona Posts: 758	ok, thanks for all the replies. Sorry Tim, I must have misread a post or something. Low68 __________________ Build Thread



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