turbo build suggestions needed

[ia96svt]

so finally after a year of saving and gathering some parts i'm going to start my build and need a few
suggestions

motor so far consists of
5.0 stroker eagle crank and rods arias -17cc pistons
teksid block arp mains and jack screws
canton oil pan and windiage tray
99 cobra heads ported
c&g fabrication front mount turbo header
and comp cams xe 270bh 114 cams with .269 .267 duration and .475 and .450 lift

i plan on using a sullivan intake and around a 76mm turbo and running e85


a few questions i have are how big of a wastegate should i go with. I purchased the hotside without one and just planned on welding one in myself.

i also planned on using a cometic head gasket. should i go with standard thickness or should i go wit a slightly thicker version.

and oil pump selection any suggestions on what should be used melling, mmr's or mmrs hurricane

any help is much appreciated!

 

[na svt]

Here are my recommendations, use a stock C head intake and cams better suited for a turbo. The Sullivan loosk good but or engien not seeing over 7000rpm they are terrible performers, the stock intake will make the same peak power but offer 100hp/100ft lbs more at 400rpm while spooling the turbos muc quicker. Also, the stock 96-98 cams are great for turbos (and free). Lastly, a 17cc dished pistons will leave you with very low compression and sacrifice a lot of off boost power/driveability.


Any billet oil pump gear will work.
A thicker headgasket will lower the compression even further, stick with thin.

Is the crank forged?

 

[ia96svt]

yes the whole Assembly if forged crank is rated 1500 and rods and bolts are rated for 1000
i sold my stock cams but do have a set of 98 mark 8 cams laying around and if i'm correct they just have a shorter duration?

 

[na svt]

mark 8 cams suck

 

[ia96svt]

what makes a good turbo cam? what should i look for long or short duration higher or lower lobe centers?

 

[na svt]

what makes a good turbo cam? what should i look for long or short duration higher or lower lobe centers?

the specs vary as each combo is different and each owner desires a different output. This is why a generic cam set like MMR's Stg 3 is often not the best choice.

For a street car with turbo friendly gears I like to keep the durations to less than 226 and the intake LC no higher than 108. This provides quick spooling and a broad powerband. The early intake valve closing allows for great off boost power and drveability even with a 3.55 or even a 3.27 rear gear.

Durations such as those found in the Comp 106400s offer terrible off boost power and do not work well with a high rear gear.

 

[ia96svt]

car has 4.10s with a t56 as of now. would custom grind cams be a good route and what would the cost be? looking to be in the 700 800 hp range

 

[na svt]

Custom grinds are the best option as they can be specd to your car.