Monkfish pd blower cam anyone run one ?

[V10 BAT]

Hi guys
Just wondered if anyone has this cam with a pd blower , I really need to know thoughts on driveability just off idle . Cam spec not available ?

I have a BTR stg 3 at the moment and before and after tuning have low vacuum (cam) ? and a high idle which was raised to help the very bad flat spot just off idle .

Not a nice drive in stop start situations ,so if it is the cam and not any other issues I will pull it out and change it , just don't want to do it again and again lol.

Was told by the cam supplier they had not had one customer come back to them with any issues .

Tuner tells me he did a car very similar to my setup with the monkfish supercharger cam and it made near same numbers as mine with great street manners ,so really just checking if people can verify that.

Trying to be aware off vac leaks , throttle body (LS2) and my 95lb FIC injectors as culprits .
TVS2300 LS6 C5 VETTE.
Any help would be great .
Cheers.

[neiljohnson]

Ive driven 007's monaro with tvs 2300 & monkfish cam & it works very well with no idle issues & it pulls very strongly all the way through the rev range

[captainblakk]

I've got one, with slightly higher ratio rockers, and a TVS, makes good power & is friendly to drive, being an auto may or may not help tho, them injectors seem pretty big, think mine are 65lb & doesn't suffer any leaning out

Edited by captainblakk on Tuesday 9th September 08:35

[007 VXR]

Yep, works great on mine,
can be driven as if it was standard until you push

Edited by 007 VXR on Tuesday 9th September 08:19

[ringram]

Reason for similar numbers is the blower only delivers a fixed amount of air per RPM.
So different cams will just change boost pressure rather than airflow!?

That being the case you might as well run the smallest cam that ticks the boxes as it will drive off idle best.

I seem to recall posting in the Vette forum that the cam you ID first up would be too large and have off idle issues..

[ringram]

Hmm, I see I didn't comment on the Stg3 at the time you asked. Personally Id have gone with the stg1.
That 23x/24x is massive for an LS1
Im sure your large injectors are not helping, but yes a smaller cam is definitely a good idea.

I still think the spec I suggested first up will be where you want to be

[ARAF]

Is MyM8V8 on a Monkfish cam in his GTS, or one of his own spec?

[gsd2000]

Gareth is running a monkfish cam but which version im not sure about

[stevieturbo]

ringram said:

Hmm, I see I didn't comment on the Stg3 at the time you asked. Personally Id have gone with the stg1.
That 23x/24x is massive for an LS1
Im sure your large injectors are not helping, but yes a smaller cam is definitely a good idea.

I still think the spec I suggested first up will be where you want to be

It does have decent duration, but that wide LSA should keep overlap down. What size is the engine ?

And just how low, is low vacuum ?

A high idle could be as much a cause of low vacuum, or a symptom of a problem.
What sort of rpm's are you idling at ?

I'd think most issues would be tuning related, sometimes idle etc can be tricky, but the cam certainly isnt wild by any means.

But a smaller cam just makes everything easier

[ringram]

Not really any overlap. But IVC will be probably quite late reducing cranking compression..
Might help explain dead spot, but Id agree tune should be reviewed. Timing will be quite a bit off OEM around there.
Injector small pulse will be quite large too Id imagine meaning AFR is wonky and clunky with the 95lb injectors.

Lots of things to consider. All fun.

Who is tuning it?

[stevieturbo]

ringram said:

Not really any overlap. But IVC will be probably quite late reducing cranking compression..
Might help explain dead spot, but Id agree tune should be reviewed. Timing will be quite a bit off OEM around there.
Injector small pulse will be quite large too Id imagine meaning AFR is wonky and clunky with the 95lb injectors.

Lots of things to consider. All fun.

Who is tuning it?

95lb shouldnt be that difficult, again the mild cam will help with that.

I'm basically running 1300cc injectors at the minute ( 2 x 660's firing as a pair ) and with the GT9 cam idle is great at 900rpm.

[MyM8V8]

I'm running the small MF cam (MF1?) with a TVS2300 at 11 psi. No problems off idle.

Can't see why you should need 95lb injectors?

[V10 BAT]

Hey ,I need to come in here more often , Great bunch of guys .

Stevie , 383 ci , will check but idle vac around 12 hg . will check again and see what it drops to
when pulling away with as little throttle as poss.

10% Overdriven damper , 34 / 30 tooth rear pulley ,at 15psi according to my gauge .

People told me 95lb injectors were needed , I have 63lbs that came with the blower so might put those back in if I change the cam ,which I hope wont result in another full tune £££ but will have
to suck that one up again lol.

Ringram , thanks bud yep I know I should have just returned that first cam and told em to send me what I asked for , wouldn't be having this convo now eh. I told you who tuner was , I feel confident with his knowledge and ability.

Basically tuner tells me this cam is bad , cam supplier tells me its good and should have no issues.

Hence enter you guys


I

[gsd2000]

Whats your injector duty cycle with the 95lb injectors?

[ringram]

I forgot who you said
Anyway,

Its hard to say anything specific without logs. But off boost your cranking compression isnt going to be high.
You could get a compression test and see what it says. Low static, plus late IVC = low dynamic compression..

In effect you have -ve ovcerlap, so a smaller cam will just have an earlier IVC and lower LSA.
A 222/230-115 is similar in overlap for example and with an earlier IVC will have a higher dynamic compression..

Im just guessing without logs and more data so probably not helping much

[MyM8V8]

To solve your problem just pick up the phone and get the MF1 cam and tune to go with it. You will have a very nice ride and bags of poke.

I'm running stock CR though. Mine makes 585rwhp at the wheels at 11psi ( 599 at 16psi)

[gsd2000]

ringram said:

I forgot who you said
Anyway,

Its hard to say anything specific without logs. But off boost your cranking compression isnt going to be high.
You could get a compression test and see what it says. Low static, plus late IVC = low dynamic compression..

In effect you have -ve ovcerlap, so a smaller cam will just have an earlier IVC and lower LSA.
A 222/230-115 is similar in overlap for example and with an earlier IVC will have a higher dynamic compression..

Im just guessing without logs and more data so probably not helping much

thats pretty much i plan to use, 222/230 114lsa

[gsd2000]

but the BTR stage 3 cam is what Eric Lancaster uses in his record breaking 8 second ZR1 Vette and what Redline Performance uses in their 10 second ZL1 camaro

[MadMaxHSV]

gsd2000 said:

but the BTR stage 3 cam is what Eric Lancaster uses in his record breaking 8 second ZR1 Vette and what Redline Performance uses in their 10 second ZL1 camaro

Suspect friendly off idle driving manner was low on their priority list...

[007 VXR]

MyM8V8 said:

To solve your problem just pick up the phone and get the MF1 cam and tune to go with it. You will have a very nice ride and bags of poke.

I'm running stock CR though. Mine makes 585rwhp at the wheels at 11psi ( 599 at 16psi)

Great result with my MF Cam and TVS