tunnel ram vs. NOS on a 351C 4V

at this time on my 351C closed 4V, I have a Holley 750,on top of a Performer and I don't like the preformer it only 5,500 rpm. I ran into a Weiland tunnel ram for $75, I'm thinking of grabbing it, but do I need it?

here is the question, what would be better (all around bang for the buck);

the tunnel ram with dual quads, (then I have to buy 2 more carbs)
or a new intake and give it a shot of nitro?

if the nitro combo with my new 750, what intake? (for 1,500 to 7000 rpms)
I like the idea of a daily driver,

I guess it boils down to this, will the 750 with NOS give me the same power on the track as the ram set up? and what one is going to tear up my new Cleveland faster?

Thanks

Although probably not what you are looking for here I go...
first of all, did you match your intake to the rest of your Combos RPM range? ie cam, gears, pistons? If so, how are you going to pull the extra 1500 RPMs?

Assuming that you did here is the next:
I have heard that a dual tunnel ram is a pain in the ass to tune...and if you want to daily drive it, that might be tough!! If you used cast pistons Nitros Oxide would probably destroy your motor at 7000 RPMs and used a healthy Shot.

There is a lot better info out there then that...that is just the hearsay that I have heard. Experienced people, or more knowledgeable wanna have a go at it, how did I do?

Jeff Given
[addsig]

A decent performance intake with a single 750 and nitrous will run circles around a tunnel ram/dual carb setup. If you have forged pistons adding 150 HP is easy and a reliable 200 HP kit is not out of the question. You'ld be fortunate to make 50 extra HP with a tunnel ram. Also, most tunnel rams for 4V Clevelands have runners that usually match the size of 4V heads. You'll lose lots of torque below 4500 or 5000 RPM. Nitrous does just the opposite. It adds gobs of torque, especially at lower RPM levels, say between 3000 and 4000 and makes your engine feel like a big block.

thanks Mach 1, I do like the idea of being able to drive to work and around about with out waisting all that gas. Then when it's time to bang heads hit the nitro....
What kind of intake would you recamend? I was thinking maybe the performer RPM, or see what Weiland has to offer. Summit doesn't offer to much in their catalog for my plant, doesn't mean they don't have it or can't get it.

Jeff, I have a good fresh rebuild 4 bolt mains, .030 over, K.B. hypers, and a descent RV cam. I had it built with NOS or a blower in mind. I also had my C6 built to handle it. I did have enough power to throw the drive shaft and break loose the perches on the 9" (now ready to buy a Tractech Detroit). that's another story...

thanks, I had a feeling, just needed to hear it from someone else.

So, what intake????????

Your intake choice depends a lot on what cam and lifters you have in your engine and ultimately, how high you want to rev it. Edelbrock doesn't make an RPM Performer for a Cleveland but they make a Performer. It's basically the same intake as the old F351-4V and has an RPM range of about 1500-5500. My choice for a 4V Cleveland intake would be a Blue Thunder which is sold through Probe Industries. It's a high rise, large runner dual plane design that is capable of producing excellent torque numbers as low as 3000 RPM but will still flow enough to make almost 500HP at nearly 7000 RPM. You have to run a distributor with a small diameter cap with that intake though. That's as easy as removing the big cap, it's rotor and the distibutor to cap adaptor and replacing it with an old 60's style small cap and rotor. For single planes there's also the Torker which is good from about 3300 to over 7000 RPM and the Weiand Accelerator which works almost as good in the same RPM range but is lower and fits under some hoods better. From the dyno test I've seen though unless I was after a very mild combination I'd go with the Blue Thunder intake.

I will say a tunnel ram looks sweet. I was getting 18 MPG in my 68 Mustang with a built 351W topped with 2 600 Holleys on a Weiand tunnel ram. Wy car was street only. If I were to race tunnel ram would not be my first choice.

<font size=-1>[ This Message was edited by: windsoreight on 2/26/02 9:43am ]</font>

<font size=-1>[ This Message was edited by: windsoreight on 2/26/02 9:44am ]</font>

Here's a Cleveland with a tunnel ram. This is my stroker before being built. I traded the tunnel ram for a few other things, but sold one of the things I traded and buying another tunnel ram later. Nothing looks meaner then a tunnel ram (except maybe a blower).
The tunnel ram is just mocked up with carbs I had kicking around, so it's not set-up.

[img]http://communities.msn.ca/_Secure/0PAC*CooVSoUFlGime!Rp9hmkod5wxiGXcQdhwfzKMBVBgOfdB KHk1Sg!Iu1w88dvLz2Ih3amFgBdPACSY0Y7!sB6J!36tkP6/Boss351tunnlram.jpg[/img]
[addsig]

Here's the set-up I traded. It had 2 600cfm Holleys.

[img]http://communities.msn.ca/_Secure/0NQBlO74SrO5agcN9lHoR1Rk0*yCUbfHTjI0QSpAQQeqkbGfO0 k2RYgcq8eQ68dRZtCJaWouE1KC7lxLv3gMBxw/tunlram2.JPG[/img]

Rick
[addsig]

no doubt about it they look cool, but tuning 2 4bbls, what a pain in the ass (for me anyhow), 18 mph, thats not to bad.

I aleady have the Performer, and it's like the thing has a governor on it. I would like to get 7000 RPM's out of her, but don't want to kill my low end torque. I have hydrolic lifters, and the spec card for the cam reads;

cam lift- int .281 exh .296 valve lift- int .486 exh .512
lobe ctr- int 106 exh 118 SAE duration-282 int 292 exh .050 duration- 204 int 214 exh

maybe you guys can tell me what these #'s mean. It doesn't lop like a heavy cam, but it does run good. it is an RV.

so, how can I get this Blue Thunder? does Probe Ind. have a web site?

2 Q's, what cam is this? and whare to find blue thunder?

Oh, I have a Malloy dist. is that small enough?