Camshaft grinds for turbo

[infinities]

Web 86B 114LC here .. 1.3 Pauter rockers, a hair over .500 at the valve. 2275 efi/turbo, 9:1CR squish piston, CB roundports 42X37.5. Nice smooth very slightly rompy idle, mild on the street.. excellent torque, pulls to 6K and beyond.

but iv never had another turbo engine 2 compare it against.

same here, but also happy with what I have.

[Matt Davis]

here we go with the secret custom b.s.



i got a quaddroople custom, triple ground, double degreed ...awe heck i don't now what i have.......

no one said SECRET jackass. i said custom and bigger than an 89. I just didnt have the cam card in front of me.

[fuey22]

then why so defensive jackass... no one said you said it. we already had this discussion on the phone. i already know what cam your running because you dont like the one were getting from the same person your getting yours from.

[Mabbo]

now now, handbags ladies...

[turbo_bob]

This is also not about race engines, but rather a street car, or even an off-road buggy.
I would like some of the guys on here to weigh in on this

I have in my street/race bug the Engle V-26 cam. It is the ratio version of the W-120. They both have 254 degrees duration @ .050
Gene Berg also sells this grind, there pn# GB 309.
I had Engle grind this cam in 112 LDA, I wish now I would have went with 114 which is the largest size for a cast cam blank. If a steel bilet blank is used I would go with a 116 LDA. This cam is so gentle with the valve train, very mild ramps, not lifting more than .513 at valve. With the past six years of using this cam/ratio rockers, I have not had a problem with the valve train. The valve job has been very consistant. I use Berg ratio rockers, cromoly retainers, pushrods, double springs, lash caps, keepers. This engine combo pulls up to 7K in 1-2-3 gears and pulls up to 6K in 4th gear no problem. The way the trans is geared that is 132 MPH.
I think this is the best turbo cam for a street car or buggy, you only need double valve springs shimed up tight and it rocks. Good for 10's in the 1/4 mile.

[Eddie Brown]

This is also not about race engines, but rather a street car, or even an off-road buggy.
I would like some of the guys on here to weigh in on this

I have in my street/race bug the Engle V-26 cam. It is the ratio version of the W-120. They both have 254 degrees duration @ .050
Gene Berg also sells this grind, there pn# GB 309.
I had Engle grind this cam in 112 LDA, I wish now I would have went with 114 which is the largest size for a cast cam blank. If a steel bilet blank is used I would go with a 116 LDA. This cam is so gentle with the valve train, very mild ramps, not lifting more than .513 at valve. With the past six years of using this cam/ratio rockers, I have not had a problem with the valve train. The valve job has been very consistant. I use Berg ratio rockers, cromoly retainers, pushrods, double springs, lash caps, keepers. This engine combo pulls up to 7K in 1-2-3 gears and pulls up to 6K in 4th gear no problem. The way the trans is geared that is 132 MPH.
I think this is the best turbo cam for a street car or buggy, you only need double valve springs shimed up tight and it rocks. Good for 10's in the 1/4 mile.

Bob, are you using, 1.4 or 1.5 rockers?. It hard to argue you with your combo.

[marcotheturbosteamengine]

2110cc
86c=in
86b=ex
114deg lobes
retarded 4deg
1.5 rockers
37psi
98ron pump gas
7500rpm max power

= 417bhp 480nm
in my street car

[turbo_bob]

Bob, are you using, 1.4 or 1.5 rockers?

There 1.45 Berg ratio rockers, which lift out to 1.50

[panel]

2275cc
110 cam
0 degree
no ratio rockers
7-10psi
94 pump gas
6300 rpm I think I logged once on a drag run
CB 044 heads 40x35

[Matt Davis]

then why so defensive jackass... no one said you said it. we already had this discussion on the phone. i already know what cam your running because you dont like the one were getting from the same person your getting yours from.

cuz you posted it under my post matt.

[volksnut]

I've used a Scat C35 with 1.25 rockers on my 1679 with good results..12.3 @ 102 with stock CB 044 heads and Zenith NDIZ carb, 12.70 @ 101 with 1 3/4" SU carb....also in my well used stock 1600 I'm running a Norris 352S mileage cam with stock rockers 15.3 @ 85 with 311 heads and 1 1/2" SU carb

[Matt Davis]

Scott, I know you have a vast background in the auto and engine arena. I love hearing other peoples view on "turbo cams" and WHY they chose them. To me the TCS cams are great for a buggy or bus, but not for a HEALTHY street turbo application. I've had this same convo with Kenny Duttweiler when I was at his shop and some other turbo "gurus" including Linginfelter when we were out there picking up an engine for a customer.

Lot's of different angles and schools of thought.

Me personally, match the cam to the heads to the operating range of where you want to make your HP then match the turbo to the system and the cfm need of the engine. I've had junk make some pretty stout numbers.

I know a lot of other people on here are more conservative with the valve train and made real decent hp as well. It's a "to each his own". I don't agree with the small cam guys, they don't agree with us. I am always intrigued at what others are doing and why. Kinda like the old addage "just lock it at 24* and it'll be fine". We've found it makes more hp with less boost by just lowering it down out of the "normal" 24* deg range.

[Matt Davis]

I want to hear the "whys" of why you chose your specific camshaft that you run with the turbo.

[MarioVelotta]

Why is it better to run large lobe centers with a turbo motor? Is it to keep the valve overlap to a minimum while maintainting duration?

[MinamiKotaro]

Why is it better to run large lobe centers with a turbo motor? Is it to keep the valve overlap to a minimum while maintainting duration?

Oui.