IAP Performance cam questions

[ace124]

In reference to their 40/80 cams.
Lots of Questions:

Can anyone confirm these cams are billet?
Do they have the Ex gear drive?
Are they within the standard shim range, assuming my valves are stock height?
Are ppl setting them up as 40/80,80/40 with 110* full lift? if so what is the Lift at top dead centre?
Im contemplating fitting a pair without removing my head, and want to make sure LATDC isnt dangerously high, since im not dry building.
What sort of power and what mods are ppl seeing with these, and in what cc engine?
Im considering them as a fast road cam.
Does anyone have a pic of the cams in question to post plz?
Anyone have a pair they want to sell?

[narfire]

I have a question... what engine? FI?
Some say they might be a bit much for a FI engine,but IAP says they are ok.
Most will say get the adjustable cam wheels and have the cams degreed in for the real benifit.
I personally recomend, if time and $$ permit, is to look for another engine and re-build that over a length of time and then take a couple of days and swap them around.
Just my $.25 ( exchange is par now ) worth
Chris

[So Cal Mark]

I would bet they are NOT billet and even though they claim they are new blanks I'm told they have a reduced base circle just as regrinds do.
As always, cam selection should be part of a package for best performance. Rpm operating range, compression ratio, exhaust system and intake system all come into play when choosing the right cams.

[ace124]

My questions pertain only to the cams. I know my engine spec.
Its an 1800 10.4:1 compression ratio, 45 DCOE's, 421 headers, big valve head etc.
Mark, i appreciate your response about the reduced base circle. Can someone esle confirm this?
Sounds like they may be regrinds in that case, which i dont want. I know what they claim, but im suspicious.
Chris your right about the dollar now, ive lost soooooo much money gambling the currency markets...enough to build many Fiats

[lanciahf]

I think Mark is right about the base circle. I have one of their cams on the intake side and I needed valve shims at the "thick" range to get the adjustment correct. ie 4.45 to 4.60. Thankfully I did not need the valve caps or have to cut my cam tower housings.

Before that I had a delta welded regrind cam that I suspect was bowed from the welding process. Definite high spots when manually turning the cam. Vendor swore that was impossible but after 6 months I removed the cam and sure enough the cam started eating into the cam tower at the "high spots".

[So Cal Mark]

my cam grinder will not weld more than 1 lobe on a cam just because of the possibilty of warpage. Hard to believe they didn't check the cam for straightness though

[FiatMac]

I have a set of 40/80 IAP cams that I bought about 4 years ago but have not yet installed. I am not sure this is the same as the one that they now sell. Just went out and did a quick, rough measurement. Installed the cam in a cam tower and measured the distance from the valve cover face to the base of the lobe with a caliper and bar stock and compared it to a stock cam. I came up with a base circle for the IAP cam that was approximately 0.3mm (0.012") less than that of the stock cam. The cams are definitely not a reground Fiat cam. No Fiat markings and the shape and surface between lobes is different from a Fiat cam.

[baltobernie]

In reference to their 40/80 cams.
Lots of Questions:

Can anyone confirm these cams are billet? yes
Do they have the Ex gear drive? yes
Are they within the standard shim range, assuming my valves are stock height? yes
Are ppl setting them up as 40/80,80/40 with 110* full lift? yes if so what is the Lift at top dead centre? 10mm
Im contemplating fitting a pair without removing my head, and want to make sure LATDC isnt dangerously high, since im not dry building.
What sort of power and what mods are ppl seeing with these, and in what cc engine? details in "New Head" hread
Im considering them as a fast road cam.
Does anyone have a pic of the cams in question to post plz?
Anyone have a pair they want to sell?

Mark does not recommend these cams for FI engines.

[So Cal Mark]

IAP claims they use new blanks, but even buying unfinished blanks still requires a cam grinder to finish the lobes. If the cam is going to have more lift than a stock cam, the base circle will be reduced. Buying billet cams is one solution, but billets cost twice what IAP is selling cams for and nearly 3 times the cost of my regrinds

[ace124]

IAP claims they use new blanks, but even buying unfinished blanks still requires a cam grinder to finish the lobes. If the cam is going to have more lift than a stock cam, the base circle will be reduced. Buying billet cams is one solution, but billets cost twice what IAP is selling cams for and nearly 3 times the cost of my regrinds

Thats whats got me confused. I mean the price, given what i know blank billets cost.
Has anyone got a pic they can post. Id like to see mysef.
AND for the 2nd time: IM RUNNING Weber 45DCOEs, these are not FI.

[BEEK]

ill post pictures later tonight, i have every grind they offer, i have used them and many more in my race cars. thier cams are billets, not regrinds, they have the advertised lift and duration. im not saying they are the best, nor am i saying they are the worst. me personaly, i have had good sucess with thier camshafts. but i will use others as well in my search for the "ultimate camshaft". i have alquati cams, i have reed regrinds, i have isky regrinds. they all have performed well after getting them set where they are happyest.

[mdrburchette]

I can't believe IAP cams aren't anything but billet. Do you guys remember not too long ago they sold blanks? I asked a lot of questions before I bought a set of their 42/82s to make sure they were billet.

[ventura ace]

You may want to ask IAP for the specs for the cams that you want to buy.

For comparison, here are the measured base circle for some of the cam shafts in my possession:

Standard cam shaft (Intake camshaft from 1608 engine): 1.018" base circle diameter, 0.376" peak lift
S-3 exhaust camshaft from PBS Engineering, regrind ('30-70'): 0.968" base circle diameter, 0.379" peak lift
B-2 intake camshaft from PBS Engineering, regrind ('40-80'): 0.908" base circle diameter, 0.411" peak lift


Alvon

[So Cal Mark]

If IAP is having billet cams made, there is no reason for a reduced base circle. I've priced having billets made and it's twice the cost of IAPs cams

[mdrburchette]

I just don't think IAP, as reputable as they are, would be advertising these cams as billet if they were regrinds. It would only hurt them.