R&D vs Type4 cam?

jetfly12

Registered User
Joined
Feb 29, 2016
Posts
61
Reaction score
38
Location
Northern Colorado
When I rebuilt my IDIT, i ordered a torque cam. I am sad to report that my butt dyno did not feel a damn difference before and after cam. Same turbo, injectors, pump and it still was the same. Won't know till I get on a dyno I guess. I ordered one during the sketchy time (late '16 early '17) when an old batch were no longer being sold transitioning to to the new version, which who knows if it is official or not yet. ****** me off and wasted $ down the drain.
 

typ4

Supporting Member
Supporting Member
Joined
Dec 24, 2005
Posts
9,092
Reaction score
1,372
Location
Newberg,OR
You may have had a IP issue.
I just had this happen with the new cam. Throttle cable was stretched and it wasnt getting full travel. New cable, new truck.
 

jetfly12

Registered User
Joined
Feb 29, 2016
Posts
61
Reaction score
38
Location
Northern Colorado
I wasn't asking for solutions russ. I had double and triple checked if I had any issues that would cause the cam to under perform, and everything was setup correctly and running normal. In my opinion, anyone will get more out of their money upgrading an IP and a turbo/bigger then stock turbo over a cam. But we will have to wait and see what the dyno says.
 

no mufflers

Supporting Member
Supporting Member
Joined
Jan 20, 2014
Posts
2,238
Reaction score
1,087
Location
rhode island
there are dyno sheets around here comparing the cams. there big heavy trucks so its tough to "feel" an upgrade thats really not going to give you huge power numbers. it also needs to compliment other upgrades as fuel and air. if you were pulling something and really using all da powa then it would be more noticeable.
 

Duke84

Registered User
Joined
Aug 18, 2020
Posts
29
Reaction score
14
Location
Las Cruces NM
I'm noticing that cam options are still very limited, seemingly due to such tight tolerances and lack of interest.

Now I have an insane idea, the cat 3208 has the same firing order as the idi. Good bet that cam won't fit our engines but it got me thinking.

Has anyone ever tried using the specs of the 3208 cam to build one for our engines?
 

Duke84

Registered User
Joined
Aug 18, 2020
Posts
29
Reaction score
14
Location
Las Cruces NM
But why? More goes into it then, "oh this engine makes more torque, let's copy the specs."


Sent from my SM-N960U using Tapatalk

I used to build race engines and a lot if the time we would custom order a cam based off the specs for other engines. I asked a legitimate question if anyone had considered it because one of the biggest concerns for any engine is getting the damn thing to breath. I didn't ask for smart a** reply.
 

79jasper

Chickenhawk
Joined
Oct 13, 2012
Posts
17,367
Reaction score
1,930
Location
Collinsville, Oklahoma
I used to build race engines and a lot if the time we would custom order a cam based off the specs for other engines. I asked a legitimate question if anyone had considered it because one of the biggest concerns for any engine is getting the damn thing to breath. I didn't ask for smart a** reply.
Most here aren't throwing in pistons with valve reliefs. Iirc, the issue is piston to valve clearance. I think was said would need a one off cam from scratch. Which brings up 2 issues; 1. Cost. Most wont be willing to pay that. 2. Cam shops not wanting to do small runs.
Maybe Russ or Wes could chime in, but I believe that was the last "update."
The heads themselves flow pretty well.

Sent from my SM-N960U using Tapatalk
 

Booyah45828

Full Access Member
Joined
May 2, 2017
Posts
877
Reaction score
670
Location
Ohio
The big issue is that there are more gains to be had with better turbos/intakes/exhausts then there is with camshafts.

As jasper said, piston to valve clearance is tight with a stock cam, any changes to overlap usually requires machine work to open that clearance up.

The hypermax idi, which was rumored at 1200hp/2000ftlbs, supposedly ran a stock camshaft........

I'm not bashing the aftermarket cam offerings, or saying that their useless and aren't an upgrade over stock. There are gains to be had over the stock cam, it's just that more is to be gained elsewhere around the engine.

As far as the 3208 cam, it doesn't really matter what it's spec's are. It's a DI engine, so the air profile that it operates at is different then what an idi operates at. So knowing it's spec's isn't relevant to an IDI.
 

Duke84

Registered User
Joined
Aug 18, 2020
Posts
29
Reaction score
14
Location
Las Cruces NM
Most here aren't throwing in pistons with valve reliefs. Iirc, the issue is piston to valve clearance. I think was said would need a one off cam from scratch. Which brings up 2 issues; 1. Cost. Most wont be willing to pay that. 2. Cam shops not wanting to do small runs.
Maybe Russ or Wes could chime in, but I believe that was the last "update."
The heads themselves flow pretty well.

Sent from my SM-N960U using

My line of thought is this, the 3208 and 6.9/7.3 idi share some of similarities. Not saying it would be easy and require other work to be done to the engine for valve clearance be it rods or pistons. The two engines have a huge difference in CR and to create the needed valve clearance would be a fair drop in the idi but the increased flow in theory should make up for that if the drop isn't too drastic. From what it looks like to me and I could be wrong is the specs from the 3208 would be a good start point and probably bring the lift down a little. Using Mahle pistons that reduce the CR may be sufficient for valve clearance. There are 3 different cams for the 3208 the one I'd use for the base line is the one for the 3208TA forged roller cam. I wish we still had our shop I'd be working on it myself.
 

hacked89

Full Access Member
Joined
May 30, 2018
Posts
1,738
Reaction score
2,328
Location
Bucks County PA
My line of thought is this, the 3208 and 6.9/7.3 idi share some of similarities. Not saying it would be easy and require other work to be done to the engine for valve clearance be it rods or pistons. The two engines have a huge difference in CR and to create the needed valve clearance would be a fair drop in the idi but the increased flow in theory should make up for that if the drop isn't too drastic. From what it looks like to me and I could be wrong is the specs from the 3208 would be a good start point and probably bring the lift down a little. Using Mahle pistons that reduce the CR may be sufficient for valve clearance. There are 3 different cams for the 3208 the one I'd use for the base line is the one for the 3208TA forged roller cam. I wish we still had our shop I'd be working on it myself.
Like Jasper said the VtP is very tight. I can give you the specs out of the international manual if you need it.
For where you're thinking is at.. I would use Justin's(rd idi) as a starting point and tinker with it from there if you are familiar with blueprinting gas engines and have software.

Sent from my SM-G955U using Tapatalk
 

Duke84

Registered User
Joined
Aug 18, 2020
Posts
29
Reaction score
14
Location
Las Cruces NM
Like Jasper said the VtP is very tight. I can give you the specs out of the international manual if you need it.
For where you're thinking is at.. I would use Justin's(rd idi) as a starting point and tinker with it from there if you are familiar with blueprinting gas engines and have software.

Sent from my SM-G955U using Tapatalk

Unfortunately I no longer have access to what's needed to do it myself. Shop was my cousins, he went back to Ireland about 10 years ago after unfortunate events working as a contractor.
 
Top